thanks for the input guys. What I think I'll do is put the 3.90 back in since I have never driven the truck and see how she runs after the restoration. If I'm satisfied then I'll probably just leave it in and if not it's a pretty easy swap I'll just replace it. My 3rd gear ratio is 1:1 so i'll check out that website that calculates rpm. To be honest I'm only going to drive the truck to cruises and shows so I might be worrying for nothing...thanks
pork
