Well I've played with ...
2.73, 3.08, 3.27, 3.31, 3.55, 3.73, 4.10, 4.11 and that was the end of the line for me.
T5, T5Z, TKO, AOD, C4, 700R4, TH350, TH400, 4L60, M20, M21, M22, T10's
Of course there's a lot of GM Muscle in there.. but what the hell, it gives one a well rounded idea what...