nah i think they should find a way to beef up the double clutch gearbox... i dunno, i'm kinda used to the r35 with a dct, seeing a stick shift in one is gonna seem wierd imo

I know RC already informed you that the LS3 has an aluminum block and aluminum heads, but I'd like to add that it's been that way since the LS1 in 1997. GM cars might not be your thing, but get with the program.