Hi Guys & Gals, I just got myself an overdrive unit for my 1965 GMC 2500, and not only an over-drive, but an under-drive as well. I finlly got a Spicer 5831-B Auxiliary Transmission for my one ton project, really cool as it's not too much bigger then the SM-420 4-speed.

[img]http://www.6066gmctrucks.org/sm-420/sp5831b-sm420.sm.jpg[/img]

Now I just need to get my butt in gear and work on this project. :shocked: