Yes I slammed 440 source, just because my first hand experience.


Head castings very sketchy, the few rods of theirs Ive used were sketchy at best, and I know of a few other guys with huge crankshaft issues, so no I prolly shouldn't have slammed them on such a broad spectrum, but I did.

I agree with your piston theory, I have DIamond slugs in 3 of the engines I have, I like them a lot, I continue to use them.

Such is why Im using them on this low power engine.