Tony, I don't want to hijack Darryl's thread and given that my Pace 427SC should be delivered within the next 4 or so weeks, I should probably start my own build thread....
But, to answer your question, I'm going with a Tremec TKO600 5 speed and a new LS3 6.2 crate motor. I already have a new WS427 flywheel and clutch kit. I'm not sure if I'm going with the 430, 480 or GMPP 525hp versions of the LS3 though. I'd prefer the latter but depends if this particular motor will pass the emissions test or not. Anyone know?
I may have to go for the standard 430hp variant and drop in a cam later on. But I think 430hp in a 980kg car will be more than adequate as a starting point