Agreed.....

but I also want to make this point clear again.

PME (Pro Motor Engineering) a top flight engine shop I used to run out of in the 70's, did back to back dyno tests long ago on a BBC with std. pistons and centered pistons. Results? Less than a 2hp gain on a near 600+ hp engine and even then, since it took a day to switch 'em, the 2 hp was well within the margin of error and was likely due to the change in air temp/humidity!

Btw, PME moved from the Chicago area years ago and has been mainly doing NASCAR engines for the Nationwide and Truck series. They really knew their stuff even way back then.