'69 302 block

[DocZG]

Im looking at building an engine for my 94, and i have a '69 302 stock bore block that i can use. Im looking for 400fwhp with a 347 and maybe 600fwhp with nitrous. I know that at 450fwhp a 5.0 block is about done. I havent been able to find much info on the power handling of the older 302's. I know that a '69 351 block is one of the best factory 351 blocks because of the higher nickle content and slightly beefier casting.

The main webbing on the '69 302 doesnt seem to be much as a '74 351 which is still a one of the more desirable 351s.

Do yall think it would be up to the task?

btw i was planing on cleaned up gt40ps, a typhoon, CHP 347 kit, and probably the expensive hyd roller cam conversoin kit from comp cams

just like everyone else money is for sure an issue, if yall dont think it would hold ill just cough up the extra and do a 393 or 408w

Thanx
Zach

 

[vristang]

Im looking at building an engine for my 94, and i have a '69 302 stock bore block that i can use. Im looking for 400fwhp with a 347 and maybe 600fwhp with nitrous. I know that at 450fwhp a 5.0 block is about done. I havent been able to find much info on the power handling of the older 302's. I know that a '69 351 block is one of the best factory 351 blocks because of the higher nickle content and slightly beefier casting.

The main webbing on the '69 302 doesnt seem to be much as a '74 351 which is still a one of the more desirable 351s.

Do yall think it would be up to the task?

btw i was planing on cleaned up gt40ps, a typhoon, CHP 347 kit, and probably the expensive hyd roller cam conversoin kit from comp cams

just like everyone else money is for sure an issue, if yall dont think it would hold ill just cough up the extra and do a 393 or 408w

Thanx
Zach

As far as I know Zach, all of the 302 blocks are the same (unless you can find a mexican block). That much power will most likely split the block in half.
A stock roller 351w block will take that power all day though.

You are dead right about the 351w blocks, and their differences. A roller conversion on a 351w can be done pretty cheap using stock 302 roller lifter components. I have done this is my 408w and it has worked pretty well. This could save you a few bucks.

jason

 

[DocZG]

Your talking about where they tap the holes so you can bolt the spider in? i have heard confliting stories about this though. I actually have all the parts for the conversion (dogbones and spider) but i heard that it can cause trouble with the cam, or that you have to use a smaller radius cam.