Trying to look forward to a future MkII project, Iwant to get my motor sorted out first, then find a car for it. Should I build the stock 3.8 as much as I can? Or swap in a SIII 4.2 with some performance goodies? I read so much about the 4.2 water jacket issues, maybe the 3.8 would be more reliable in a high performance build? What are some different driving characteristics of the two?