Mark quick question for you if I may, For my race car I have a 7" 3.9 rear diff and std 3.6 front diff, I have bought some alledgedly 3.9 drop gears and chain, they are a lot smaller cogs and chain length than thr original but can you tell me how many teeth each should have please?
I will count them tommorrow and post up how many mine have
I just want to confirm they are the right ones before putting them in the car!

cheers
steve