Originally Posted by LATECH
You should CC the heads to see just exactly what the chamber size in for both. Its the only way to really know where your compression will be at. None of the head charts I looked at are consistent, nor have they been accurate in the past, some yes and some not.
I am guessing the 94s will be smaller chambers, as the 64 are from a 455 , which usually means larger chambers due to cylinder size.
i haven't looked at them side by side but memory of the 64 chambers vs looking at the 94 chambers i would say the 94's looked smaller. the valves are definitely smaller but i don't know if a 350 really needs the giant valves.