I just bought a 64 Le Mans to cut my teeth on. It has a 327 in it, with a 4 speed Muncie. The rear end is an 8.2 B.O.P with a 2.78 ratio. Yes, it is dead off the line and I want to re gear it but the more I read, the more confused I get. Im pretty sure I should go with a 3.23 but can't figure out if I can with my carrier. I dont want to buy both ring and pinion and also a new carrier. Can anyone tell my for sure, how low(in power) or high(numerically) I can go with my gear ratio by just replacing the ring and pinion. Can someone suggest a knowledgeable company that i can call, tell them what I have, and they can tell me what fits.im new to this game, so any help is much appreciated.