I am going insane with my cars gear setup. its running a close ratio transmission m21, and has i think a 3.55 rear end gear. now it pulls about 2500rpm at 50mph which is hogging so much gas i could have paid for another car.. i dont know but i was thinking of putting in a different rear end gear, maybe a 2.74? i think the car has enough power to get going with a 383 stroker and all but i just cant find out where to buy a lower rear end gear and then how to install it? thanks for any help