I can tell you this i ordered a set of kb400 pistons for my dads 383 rebuild and it has been the best decision i ever made in my 30 plus hot rodding years!
Why?
Well 383 has very little choice for a good compression piston ,
I wanted same as you 10.1 we got 10.2 with .046 in quench with 1009 felpro gasket.
Edelbrock heads,rpm intake and comp 275 hl cam , with cat roller rockers and a hp 750 holley and you have pretty much a solid 13 sec car!
that burns no oil and the oil stays way cleaner than my 493 with forged ross pistons.

what i am saying for a tough sounding cruise night car no one knows what the pistons are LOL !