Hey slowrolla, I've read a bit about the I head swap. There are a few obstacles to get around. The I head has a different shaped combustion chamber which lowers the compression ratio to approx. 7.9:1, which is waaaay too low. I've been wondering if I could somehow just use the E head but use stiffer valve springs and the I cam to let it rev as high. As far as I know the only thing that keeps the E from revving is the weak valve springs. Have you done the swap?