High Lift Premium Springs, Locks, and Retainers Kit: 1988-1997 EFI 460
We have tested hundreds of combinations of springs, locks, and retainers to develop our premium spring kits. In collaboration with Howards Cams, we’ve assembled a second configuration designed specifically for higher lift applications.
This kit features our high-lift premium springs, along with a positive offset 10-degree lock set and matched retainers. This combination increases available lift clearance, providing approximately an additional .120″ between the retainer and valve seal—making it well-suited for more aggressive cam profiles.
This setup is compatible with our original three camshafts, as well as our new line of high-lift cams. It can also be used with lower lift cams when paired with higher ratio roller rockers. As always, we recommend verifying clearances during installation, particularly with E7 heads, which can sometimes have slightly reduced clearance.
These springs provide a minimum of 115 lbs of seat pressure while maintaining the same open pressure as our original kit. The key advantage is their capability to support up to .650″ lift. We have successfully broken in Howards cams using this setup and have consistently maintained proper “over-the-nose” pressure without cam issues.
Howards Cams “460 EFI Guys Stage 1.8” Kit for EFI and Carb 460 – This cam is a “WELL MANNERED MONSTER”
.558 / .571 Lift, 112 LSA, 212 / 218 duration @ .050 lift W/39 degrees overlap, 4 degrees advance cut in for 108 intake centerline. Years of testing and trying out cams and throwing high ratio roller rockers on top of our cams has helped us develop this camshaft package. This is a well mannered monster that works great with EFI and makes great torque across the whole powerband. This cam is the answer to unleashing these motors’ potential.
- Howard’s hydraulic flat tappet camshaft
- Howard’s lifter set
- True Roller Double-Roller Adjustable Timing Chain and Gear Set
- Howards premium high lift springs, 10 degree locks and retainers
- Camshaft assembly lube
- Oil Pump priming rod
- 6 quarts of Lucas Engine SAE 30 break-in oil
- 16 ounces of Lucas ZDDP additive
- Valve Seals (Howard’s positive stop)
This cam just blew away what I even thought was possible with these engines and stock ecu’s. It is the key to making big power even with the E7TE heads. The big lift and short duration is the key with this cam.
We developed this cam after running our stage 1 cam with 2.0 ratio roller rockers to kick it up to .566/.600 lift, then with 1.9 ratio to see the difference again. What we discovered was that a big lift and short duration makes for a well mannered monster. I still chuckle when the truck fires up crisp and clean at 0 degrees outside. It makes the truck race up to speed with ease and like never before, even at elevation, climbing a hill and right into the wind—- it straight pulls. I then spent a lot of time with Howards coming up with this lobe profile to nail down what I wanted on this one, and then to come up with a springs, locks, and retainers package to accomodate what we developed. Don’t shy away, this cam will also work amazingly well in carbureted engines.
DON’T BUY JUNK CAMS NO MATTER THE NAME ON THE BOX. THEY DON’T KNOW WHAT WILL WORK WITH EFI OR THEY WILL WIPE OUT YOUR ENGINE, IT’S NOT WORTH SAVING A LITTLE MONEY.
After years of trying and losing over 20 cams we decided to modify our favorites and make our own lines. We partnered up with Howard’s cams to get these custom made (IN THE USA) to our specifications. Like so many others, we have fought low quality cams failing on us (most of them with a big name on the package). Not willing to take any chances ever again, we are thrilled to have partnered up with Howard’s Cams, and their unrivaled quality. To be able to run this camshaft you have to swap to the included springs, locks, and retainers. We have always had great spring pressure with this setup, we rarely even put shims under these to hit our target of seat pressure, but also keep the “over the nose” pressure where we want it. This package will buy you 120 thousands more clearance between the valve seal and valve retainer. You will still want to check your clearance, especially with the E7TE heads. We have never lost a single Howards camshaft, and to make sure you don’t either, we are sending you the same break-in oil we run. We also include a bottle of the zddp additive that the oil manufacturers stopped adding to protect your engine. The 16oz bottle we include is enough for 10 oil changes to come.
new cam kit price including oil and additive
$1030 (Includes S+H)
Howards Cams “460 EFI Guys Stage 1” Kit for EFI and Carb 460
.490 / .519 Lift, 112 LSA, 205 / 213 duration @ .050 lift, 4 degrees advance cut in for 108 intake centerline. This is a clean and crisp torque cam that will not disappoint all the way up to the rev-limiter.
- Howard’s hydraulic flat tappet camshaft
- Howard’s lifter set
- True Roller Double-Roller Adjustable Timing Chain and Gear Set
- Howards springs, locks and retainers
- Camshaft assembly lube
- Oil Pump priming rod
- 6 quarts of Lucas Engine SAE 30 break-in oil
- 16 ounces of Lucas ZDDP additive
- Valve Seals (Howard’s positive stop)
DON’T BUY JUNK CAMS NO MATTER THE NAME ON THE BOX. THEY DON’T KNOW WHAT WILL WORK WITH EFI OR THEY WILL WIPE OUT YOUR ENGINE, IT’S NOT WORTH SAVING A LITTLE MONEY.
These cams will work with your stock speed density 460 computer and deliver great results. Check out our youtube videos if you want to see them in action. Don’t shy away, they also work amazingly well in carbureted engines.
After years of trying and losing over 20 cams we decided to modify our favorites and make our own lines. We partnered up with Howard’s cams to get these custom made (IN THE USA) to our specifications. Like so many others, we have fought low quality cams failing on us (most of them with a big name on the package). Not willing to take any chances ever again, we are thrilled to have partnered up with Howard’s Cams, and their unrivaled quality. To be able to run this camshaft you have to swap to the included springs, locks, and retainers. We have always had great spring pressure with this setup, we rarely even put shims under these to hit our targeted 105 lbs. of seat pressure. We have never lost a single Howards camshaft, and to make sure you don’t either, we are sending you the same break-in oil we run. We also include a bottle of the zddp additive that the oil manufacturers stopped adding to protect your engine. The 16oz bottle we include is enough for 10 oil changes to come.
new cam kit price including oil and additive
Howards Cams “460 EFI Guys Stage 2” Kit for EFI and Carb 460
.519 / .519 Lift, 112 LSA, 219 / 225 duration @ .050 lift, 4 degrees advance cut in for 108 intake centerline.
This is an awesome all around EFI friendly cam. It has a great exhaust tone, flat and strong torque curve, and will work flawlessly with Speed density EFI and make great power. This cam will work with your stock speed density ecu and does not require a higher stall convertor. We have passed emissions tests with this cam flawlessly.
- Howard’s hydraulic flat tappet camshaft
- Howard’s lifter set
- True Roller Double-Roller Adjustable Timing Chain and Gear Set
- Howards springs, locks and retainers
- Camshaft assembly lube
- Oil Pump priming rod
- 6 quarts of Lucas Engine SAE 30 break-in oil
- 16 ounces of Lucas ZDDP additive
- Valve Seals (Howard’s positive stop)
DON’T BUY JUNK CAMS NO MATTER THE NAME ON THE BOX. THEY DON’T KNOW WHAT WILL WORK WITH EFI OR THEY WILL WIPE OUT YOUR ENGINE, IT’S NOT WORTH SAVING A LITTLE MONEY.
These cams will work with your stock speed density 460 computer and deliver great results. Check out our youtube videos if you want to see them in action. Don’t shy away, they also work amazingly well in carbureted engines.
After years of trying and losing over 20 cams we decided to modify our favorites and make our own lines. We partnered up with Howard’s cams to get these custom made (IN THE USA) to our specifications. Like so many others, we have fought low quality cams failing on us (most of them with a big name on the package). Not willing to take any chances ever again, we are thrilled to have partnered up with Howard’s Cams, and their unrivaled quality. To be able to run this camshaft you have to swap to the included springs, locks, and retainers. We have always had great spring pressure with this setup, we rarely even put shims under these to hit our targeted 105 lbs. of seat pressure. We have never lost a single Howards camshaft, and to make sure you don’t either, we are sending you the same break-in oil we run. We also include a bottle of the zddp additive that the oil manufacturers stopped adding to protect your engine. The 16oz bottle we include is enough for 10 oil changes to come.
new cam kit price including oil and additive
Howards Cams “460 EFI Guys Stage 3” Kit for EFI and Carb 460
.513 / .536 Lift, 112 LSA, 215 / 225 duration @ .050 lift, 4 degrees advance cut in for 108 intake centerline.
You can absolutely hear this cam. It is a tire frying animal. It is actually an improved upon design based off of the towing beast cam design. It has worked great with EFI. We have run even larger cams than this with the stock efi computers, but we learned to trim those back to this spec to be much happier for a daily driver, but still deliver great results. This one has an aggressive exhaust tone, flat and strong torque curve, and will work with Speed density EFI and make great power.
- Howard’s hydraulic flat tappet camshaft
- Howard’s lifter set
- True Roller Double-Roller Adjustable Timing Chain and Gear Set
- Howards springs, locks and retainers
- Camshaft assembly lube
- Oil Pump priming rod
- 6 quarts of Lucas Engine SAE 30 break-in oil
- 16 ounces of Lucas ZDDP additive
- Valve Seals (Howard’s positive stop)
DON’T BUY JUNK CAMS NO MATTER THE NAME ON THE BOX. THEY DON’T KNOW WHAT WILL WORK WITH EFI OR THEY WILL WIPE OUT YOUR ENGINE, IT’S NOT WORTH SAVING A LITTLE MONEY.
These cams will work with your stock speed density 460 computer and deliver great results. Check out our youtube videos if you want to see them in action. Don’t shy away, they also work amazingly well in carbureted engines.
After years of trying and losing over 20 cams we decided to modify our favorites and make our own lines. We partnered up with Howard’s cams to get these custom made (IN THE USA) to our specifications. Like so many others, we have fought low quality cams failing on us (most of them with a big name on the package). Not willing to take any chances ever again, we are thrilled to have partnered up with Howard’s Cams, and their unrivaled quality. To be able to run this camshaft you have to swap to the included springs, locks, and retainers. We have always had great spring pressure with this setup, we rarely even put shims under these to hit our targeted 105 lbs. of seat pressure. We have never lost a single Howards camshaft, and to make sure you don’t either, we are sending you the same break-in oil we run. We also include a bottle of the zddp additive that the oil manufacturers stopped adding to protect your engine. The 16oz bottle we include is enough for 10 oil changes to come.
new cam kit price including oil and additive
Lisle Valve Holders
You can use these in the truck or on an engine stand. Simply hook up your air compressor line and the air pressure will hold the valves from dropping while you install valve springs. These Lisle valve holders have 2-sizes for both 14mm and 18mm spark plug threads.
Pair of Brand New, Upgraded F3 460 EFI Cylinder Heads – Reworked with Bronze Manganese Valve Guides – for Flat Tappet or Roller Conversion Cam
Custom Built to Order. These are brand new castings, with improved wall thickness. We then rework them, and install bronze manganese valve guides. Diamond honed not reamed, micro-polished valves. Improved Valve job set up for lean burn EFI heat dissipation. Dressed with premium seals, springs, locks, and retainers. Shipping and handling included.
$2800 for Flat Tappet
$3000 for Roller
Premium Springs, Locks, and Retainers Kit: 1988-1997 EFI 460
Do you wonder why your 460 has lost power over the years? Well after 30 years your springs are dead and soft. They should be 100 lbs at the seat, and over 250 at the nose of the cam. Most we measure are lucky to have 45 lbs at the seat and only 130 over the nose. Often they are even worse off than this. This means you are floating valves and losing compression, power, and efficiency. We have measured hundreds of combinations and partnered with Howards Cams to bring you a premium set-up that will increase the available lift to more than any other combination can offer. This will allow you to run our stage 2, stage 3, and stage 3 + cams without having to have the guides cut down. You will want to still measure the available room as a few sets of the early E7 heads had a little less.
SBF 302 / 289 / 260 EFI CONVERSION KIT
These kits include the Edelbrock Victor Junior EFI intake manifold and fuel rails. From there everything you need to complete the swap comes in the kit. It includes our same bullet-proof stand-alone wiring harness, ecu, injectors, hardware, and components as before. The conversion can be done in a day (simply an intake swap and run some fuel lines). Along with the kit you will receive a new: Fuel pump, Distributor, Ignition module, Air charge sensor, Water temp sensor, 4-wire Bosch O2 sensor, MAP sensor, Relays, and fuses. Everything comes with a 1-year unlimited mileage warranty as well.
