Hey Stepside, Would you have any serious hangups about installing 402 heads on a 454 or 454 heads on a 502?
How about running 283 heads on a 327?

The factory used the same castings and valve sizes on larger engines that were used in smaller engines.


It is obvoius flow is decreased & Horsepower decreases.

Low speed torque is increased w/throttle response.

H/O 305 heads flow better than 400 SBC truck heads with stock valve sizes.



Your rational judgement is in question.

I see this all the time people thinking 45 cubic inches is a big deal.

I wish people had a better grasp on math & better knowledge of stock parts.