Piston ?
http://www.summitracing.com/search/D...?Ns=Rank%7cAsc
If you tried to use a piston with a stock compression distance with a 6.0" rod on a 3.75" stroke the rings would come up past the deck of the block, or if you used a piston meant for a 5.700" rod stroker with a stock crank it would be half an inchish below the deck and make no compression atall.
So what crank and rods are you using?
http://www.competitionproducts.com/P...ctinfo/RP570P/

