I am doing a v8 swap in my 1950 Chevy Truck 3100 and I have a rear end out of a 60's chevy truck. I believe it to be out of a 63 and up 12 bolt. I have tried looking up the numbers on the axle tubes and had no luck getting the right year. So I open the pumpkin cover and looking on the pinion gear and got the serial number off of it: 3917778 11 41GM 4 65 2 27. Are the last numbers the year/month/day? Any help would be great.

please feel free to email me if you can help,
[email protected]

Last edited by Guillermo; 05/01/2014 4:45 AM.

Guillermo Ortiz Jr.

1950 Chevy 5 window with a 54 GMC cab swap