Thanks for the response. Yes both differentials were the exact same, including the numbers on the spider gears. I made a road trip today down south into Oklahoma where there are quite a few 1.5 ton trucks for parts. I did find what I was needing, but we pulled axles out of 4 different ton and half chevy rear ends to find a set with 10 splines.
Thanks to Tom's truck parts in Miami Oklahoma. Tom said as long as he has been in the parts business he did not no why there was a difference. All of his rear ends looked exactly the same, but one had the 10 splines instead of 16. Im good to go!
Thanks Kevin
