Whether to use the FT or dished pistons comes down to simply entering the numbers (rod length, intake valve closing point and SCR) into a calculator to see if the DCR (using the cam(s) you have on hand) falls into the range of pump gas or not.
Personally, I'd spec the cam to work w/the heads and the LT1 FT pistons- even if it means buying another cam. The advantages in the quench/turbulence created by true FT pistons shouldn't be discounted. If you need more chamber volume, work the chambers to deshroud the valves and gain volume. It's not that the valves are shrouded w/1.94" intakes, but the idea is to get some benefit other than just enlarging the chambers if possible.
Last edited by cobalt327; 02-07-2012 at 03:37 PM.