Thread: Help with cam for 434 or 409 SBC

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I am in the process of building a motor. I have 2 options I am considering, but need help with the cam. It seems everyone has a different idea when it comes to this. Need to decide soon, just a side note, I had to go to .040 over because the block was a sloppy 406 when I got it. Good block though, just a sloppy bore.
Here is my setup:

Option#1
400sbc +.040 over + 3.75 stroke (stock)= 409 cu.in.
World Sportsman II 72cc, 2.02 int. 1.60 exh.
Roller rockers
.059 headgasket
Scat forged rotating addembly
Forged pistons flat
RPM Air gap intake (dual)
770 Holley truck avenger
MSD ignition/dist
2800 stall

Option#2
Same as above, except stroked.
400sbc + .040 over + 4" stroke= 436 cu.in.


This is going in a 4x4, which is used for mud. A little
trail riding, usually just on the way to the mud.
Just started to understand motors, so still very new
at it. So if something sounds out of place, please tell me.

Thanks alot,
Matt

Go here http://www.airflowresearch.com/ click dyno tests at the top of the page, click Chevy, scroll down to 550 hp 406.

There is a recipe for a 406 that will make in excess of 460 ft./lbs of torque from 2,500 to 6,000 rpm's. That's what I would build. I figured that to get the 10.3:1 that they used in the dyno test with your bore, you'd need the 76 cc chamber heads they used, a Fel-Pro 1004 gasket (0.041" compressed), zero deck and pistons with 6 cc's of valve relief. Like they show, the motor should run on 93 octane pump gas. The 0.041" squish is what will prevent it from detonating.