FstFoward, yes, that makes sense. Before anybody goes any further, what tranny do you have and what is the rear end's gear ratio... or what it'll be when done..
Well, got under the car today, only numbers I could find on it were C95664J on the side plate, and C95639U on the case. Other than those, couldn't see any others.
Rear end wise, only found one set of numbers and they were unreadable, but the whole thing looks like it was installed not horribly long ago. Real clean(cept for the leak on the rear cover) paint is beautiful, not like a brushed and painted unit.
Engine # is 2780930-340-1
Heads, passenger side is a J, crivers side just has a blank pad, no O, X, or J, so, now what am I looking at???