Holeshot wroteAre you "boost" guys filling your 4.165"+ blocks with concrete???
From all the research I have done, the smaller bore blocks can apparently take a bunch more boost w/o distorting & can make more power with more boost & a round hole. Not to mention that the super-heated gasses going past the pistons may take some metal along for the ride to the oil pan.
If you REALLY want to overboost an engine, go with a Studebaker V8. I know of a drag racer (Ted Harbit and his Chicken Hawk) who runs 35psi on the SAME BLOCK for OVER 30 YEARS!!! Not a single casting failure either.
File that under: "Who asked you, anyway?"