Quote: It's good to see this thread take on a life of it's own! I've been to busy to flow the other heads and sonic test the 5.7 block. I'm hoping to have some info this week. Icon just finished scanning the late 5.7 head, and will soon have both a 10.25:1 piston and 13:1 piston with a 3.900 stroke and 4.050 stroke in a 5.7 bore size as well as 6.1 bore size. This piston can only work with the late head as it's chamber is different than the early 5.7 and 6.1. Brian
