The 3.6L motor is a HUGE improvement in power/performance over the old 3.8L. If I had one in my old 07, I don't know if I would have been so eager to do an LS swap. Having said that, the 3.6L that I have in my 2012 has had it's share of problems. Granted, that was the first year they put them out and I would hope that they got some of the bugs fixed by now. If it were me, I would do it again.