Good 360 rebuild kit?

retty much any kit supplier can substitute parts as you want. If the goal is shakedown and something to have a litle fun in, talk to the rep about a flat top piston with 2 valve reliefs, hypereutectic, and a compression height of around 1.685 or so. Anything shorter will be "low" compression regardless of the catalog compression rating. If you're going with the factory heads, I'd say run a mild high torque cam and dont get the static higher than 9.5:1.