Okay, I'll admit it, I'm lazy... Looked over the posts and found some helpful info, but not quite what I need. Anyway, here is my question... I have a 200R4 behind a built 350 in a '72 GS. 3:42 posi, 245-60R15 BFGs. Speedo is off around 5-10 mph depending on speed. What color gear do I need for this combo in my trans? It's cold and I'm unable to determine what's in there now, only that it is indeed off slightly (runs fast). Anybody with this combo? Any formulas that I can use without knowing the current tooth count? Thanks! GS
