lechols1

hi. i have a 351w block that i want to build for my 90 mustang. its a factory 2 bolt i think it is out of a truck. where would i find out about this block and whats the max hp i could run out of it. i plan on better rods and crank and puttin in a girdle

thanks

92stangerang

i don't think you could over max a 351w. ive seen them push well over 350 with mostly stock internals. from factory the 351w 4 barrel came with approx 290 just to give you an idea.

aru_next

well the 302 is good to like 500ish... the 351w blockwill be fine its the bottom end the will hold you back

revs_22

you can build the **** out of a 351w but the weak point is the block. most 351w blocks can only handle around 600hp. but you can girdle the lifter valley and the caps so i dont see why they could not handle 650-700hp. i am building a 408 that will have around 600 all motor and plan on sprayin it with a 200 shot of juice. just make sure you gridle the lifter valley and main caps if you plan to be over 600hp..