Here's a tip for you 250 builders- - - -307 V-8 pistons are a direct swap, same size, weight, wrist pin size, and compression distance, but they're flat-tops. It's a quick way to get a nice compression increase, and it really turns the old 250 on, especially with a little more camshaft at the same time. I've done it on several buildups with good results.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!