NC C10 Fan,
I think you may be correct. I did a search on the site and found a note that said if you count the turns on the drive shaft to two full turns on one wheel that would give the ratio. Two full turns gets me about 3 & 3/4 turns on the dirve shaft, so 3.73 looks correct. I like the idea to keep my rear end and get a 700r4, I think that would save me some cash and keep the truck more intact. I will have to decide on the 5 vs 6 bolt pattern also. Any thoughts re: that?