Quote Originally Posted by slovic-fcc
thanks alot brian! (I think I spelled it right) and yeah I'll prolly go with the gsr tranny eventually.
I will say from my own research that a GSR tranny is better choice because of the gearing.

Now, if you decided that MPG is still high priority, then you could go with an LS tranny. Longer gears than the GSR to include a longer final drive. That would still be a fun Boosted LS and be able to maintain good MPG.