How much power do engine mods yield?

RustyRatRod said

The 302 to slant comparison is about like comparing a nun to a 10 dollar street walker. It doesn't fly. The bore sizes are so different, no way in heck would the flow comparisons even be close. Ever. Find something else to pound on. That doesn't work.

Click to expand...

THAT was my whole point, Einstein. There is NO ROOM for big valves in a slant motor because the bore centers are too close; only 4"... The Chevy small block is 4.4".

That is why they will never run, naturally-aspirated.

Maybe, someday, if somebody designs and produces a 4-valve head for this block, it will have a chance to breathe, but until then, forced induction (or N2O) is the only way...