Speedmaster, Edelbrock LA, or magnum cylinder head MILLING LIMITS & common Milling Optimization
if i were attempting to build a 360 bumping 10.5+ then i'd be looking real, real close at a mahle powerpak piston kit. lighter than KB, forged, updated ring pack, and with a close chambered head (*cough* magnum *cough*) you're easily there. wanna get frisky? cut the block so the pistons are positive deck and dial in your compression ratio with headgaskets.