351 W Block

[coralcoupe1993]

How strong or weak is a 1986 block? Am I going to spit this thing like a piece of fire wood with a big stroker kit and spray? :slaphappy:

[Rio94gt]

Im in your boat right now. Building a Windsor based stroker. From what ive been told is that 650 RWHP isnt a problem. Ive read that the 69-74 blocks are marginally stronger (how much noone knows) but this has never been confirmed.

[HidalgoGT]

I was told by woody my 94 roller block was good to 750 fwhp. With good parts of course.

[coralcoupe1993]

what years were the 351s rollers?

[HidalgoGT]

94 up i believe it was.

[349Stroker]

86 won't take the hp.They are thin junk just like the newer blocks

69-74 is what you want if you want to make serious hp or the 94 roller blocks

[biminiLX]

Worry more about the rpm than the power IMO. 700hp/7000rpm is thrown around, but take that for what its worth.

86 won't take the hp.They are thin junk just like the newer blocks

69-74 is what you want if you want to make serious hp or the 94 roller blocks
Agree the early block are best but nothing I know of the '94+ blocks make them stronger, they're just roller ready. Must be an F4 casting, not just a '94+ truck.
-J

[coralcoupe1993]

Cool. I built a 408 with a 69 block in the past. I dont think I will use this 86 block. Doesnt sound any stronger than my E7 blocks.