1985 454 best heads to use?
Subscribesutphen 30
Registered
close
Today
- Join DateJan 2006
- Locationtaxachusetts
- Posts:3,601
-
Likes:1,027
-
Liked:1,169 Times in 605 Posts
Quote:
specs and price,,thanks in advanceOriginally Posted by adk61
I also have an oval port head available
Quote:
But you need to tell us what specifically you want to accomplish and your budget....
You could easily build a 420 clone, a 420 clone with better heads... Do you want to go with a roller cam? Do you want to spin 5000 rpm or 6200 rpm?
a basic vanilla build of a stock 454 mag bottom with budget friendly EQ heads, or a little more for Big Al's heads or a lot more for some AFRs, something somewhere between a 731/ 741/500 efi roller cam setup and valvetrain, a set of used sm's or gills could get you in the neighborhood of 450-500 hp easily but each setup would be a little different.
Thanks Rob... and for the money... properly prepped AKR/Promaxx heads will outperform the AFR heads... in dollars/performance!!!Originally Posted by phragle
there are 1,352,751 threads on building 454s on this site. But you need to tell us what specifically you want to accomplish and your budget....
You could easily build a 420 clone, a 420 clone with better heads... Do you want to go with a roller cam? Do you want to spin 5000 rpm or 6200 rpm?
a basic vanilla build of a stock 454 mag bottom with budget friendly EQ heads, or a little more for Big Al's heads or a lot more for some AFRs, something somewhere between a 731/ 741/500 efi roller cam setup and valvetrain, a set of used sm's or gills could get you in the neighborhood of 450-500 hp easily but each setup would be a little different.
Sutphen 30
306 CC intake runner, 2.25 SS Ferrea Intake valves, 1.900 Super Alloy Ferrea exhaust valves, Pac springs (spec'd to customer cam) hardened steel !0* locks and retainers, ARP studs and hardened 3/8" guideplates...
All my heads are spec built, not production line off the shelf product (more bang for your buck) takes a bit longer to get a lot more, but worth the painfree process
306 CC intake runner, 2.25 SS Ferrea Intake valves, 1.900 Super Alloy Ferrea exhaust valves, Pac springs (spec'd to customer cam) hardened steel !0* locks and retainers, ARP studs and hardened 3/8" guideplates...
All my heads are spec built, not production line off the shelf product (more bang for your buck) takes a bit longer to get a lot more, but worth the painfree process
getrdunn
Registered
close
04-11-2026
- Join DateFeb 2009
- LocationNW Michigan
- Posts:8,356
-
Likes:1,192
-
Liked:1,515 Times in 824 Posts
Quote:
306 CC intake runner, 2.25 SS Ferrea Intake valves, 1.900 Super Alloy Ferrea exhaust valves, Pac springs (spec'd to customer cam) hardened steel !0* locks and retainers, ARP studs and hardened 3/8" guideplates...
All my heads are spec built, not production line off the shelf product (more bang for your buck) takes a bit longer to get a lot more, but worth the painfree process
Originally Posted by adk61
Sutphen 30306 CC intake runner, 2.25 SS Ferrea Intake valves, 1.900 Super Alloy Ferrea exhaust valves, Pac springs (spec'd to customer cam) hardened steel !0* locks and retainers, ARP studs and hardened 3/8" guideplates...
All my heads are spec built, not production line off the shelf product (more bang for your buck) takes a bit longer to get a lot more, but worth the painfree process
That's the oval port. I was thinking they were 290 cc. Then again I thought the smaller rectangular ports were 320 but they are 317. Regardless what great heads and I hope they really take off.
290 edelbrock heads (Marine if kept in salt water), Torker II intake (even with just a 315 HP cam is a big jump like adding 75 100 something NOS) Magnum cam even better and go with the newer Magnum firing order. Notch the bores for intake valve clearance. 850 Quick Fuel marine carb. Figure in different props too
Quote:
I never stated what they started life as getrdunn... and thank you so do we hope they really take off!!!Originally Posted by getrdunn
That's the oval port. I was thinking they were 290 cc. Then again I thought the smaller rectangular ports were 320 but they are 317. Regardless what great heads and I hope they really take off.
CDShack
Registered
close
02-17-2026
- Join DateMay 2010
- LocationRed Oak, Texas
- Posts:996
-
Likes:475
-
Liked:189 Times in 93 Posts
casting 049 large oval port heads. Will make more torque down low, good to 6000rpm if massaged a little. will need to have hardened seat put in for unleaded fuel, and of course, change intakes. Best high torque old school head around, IMHO.
A block that age I would make sure to have it mag'd and sonic tested. You may also find yourself needing to helicoil all of the head bolt boss'es. Might be better off buying a 454HO or 502HO long block.
