opinions welcome on build.

You’re 100% correct.
My apologies.

Just giving examples and pointing out that in my experience there’s no reason to fear the 4”(or 4.125”) stroke or the cubes.

Carry on.....
Not to drag this off topic but all the FAST guys run huge cubic inch engines (which takes huge cubic $$) because they are not limited in cubes, but they do have to be Stock Appearing WITH factory exhaust manifolds!
The reason all FAST engines are huge is because they are saddled with a restrictive induction and exhaust tract AND they don't care how big the engine is as long as it APPEARS stock.

So we all know an engine is an air pump right? So we rev it higher to pump more or we make it bigger to pump more--correct? Anyways , I give up. I was just trying to spur on interesting and though provoking discussion on efficiency and FAST engines are not really the pinnacle of that. Carry on. J.Rob