OOPS! I just reread your earlier post on how to do it. I looks I didn't read it carefully enough, I will retry it when I get back to the shop.

 

You have the 3.55. Turn one wheel on an open differential turn the wheel two times or one time and mutiply by 2.

 

My next question is about the strength of the rearend. I am building this truck to be somewhat of a hotrod and with most likely be swapping out the 318 for a built 408 small block or a pretty hot 440. For now the 318 will be rebuilt to get the most performance out of it that I can. How much power is the stock 9-1/4" capable of holding?

 

LOL I knew something was wrong because this mechanically always works. The opposite wheel must be held still during this process.