This is good information. I've been tossing around the idea of swapping in a 4.2 for quite a while, but still debating converting my 235 to injection using MS or a modified factory computer.
One question on the 4.2 if you don't mind, what does it take to hook it up to a traditional trans? I'm not aware of anything but an automatic behind it from GM. Can an SM420 be hooked to it?
Devin