Yea, I meant manual tranny without OD. If you really tweak it you might get it to work, but FI is so much easier and has a huge performance potential, not to mention the computer compensates for mountian driving, cold weather, hot weather, has knock retard built in, oh and its computer tuned so you dont have to change jets, you just reprogram on the fly with the LS1 stuff.
For what it's worth, I took 2nd and 3rd to 6500 today and it pulled like a freight train to 100 mph before I knew it. Makes me wonder how long the stock rear will last if I get on it a bunch. I gotta go to the track and see what the modified LS1 can do. It pulls so hard you have to really concentrate on the tach and the road to say in control.