Stock short block and cam

What is the most lift you can run on a stock piston with a 2.20 valve?

Need more info than that probably. What is the duration you are looking at (duration and lift come together to determine how much lift before hitting the pistons), and how much lift are the heads capable of. If they are stock pistons, you won't want to rev that thing too high, as cast pistons don't like a lot of speed, and the heads if stock can only do about .550 or a litle more depending on how the guides are set up.

241-249@.50 582-600 ported D3 with a 2.20 1.76 valves