May I ask why you don't go to a T5 out of a S10, or Camaro. You can get a 4sp from them too, but the 5sp in better if you're looking for fuel economy since it has OD. Sound like a nice set up, you have got there. What rearend do you have under it? Sorry I can't help you with any of your questions thou, you'll have to wait for the older, experienced guys to get on here.
Nate
