Ive got an 89 with a 3 speed that sucks. It is still in good shape but Im getting tired of not having overdrive. My question is if an auto out of a 2 gen will bolt in. Im a welder so I can take care of the cross member and shortening or lenghting the driveshaft but I dont know about the shifter or flex plate . Any input would be greatly appreciated.

 

Its been done before, here's a nice little write up about doing it from the sticky,
https://www.dieseltruckresource.com/...d.php?t=114702

 

Thanks for the answer. I should have looked there first.