Two trucks 79 and 88 both had regular trans, I’m planning to install the overdrive 518 in both and wondering if the trans mount can adapt to the overdrive?
With some fabrication you can make it work. IIRC, I made an "adapter" steel plate to attach the three bolt pattern OD to the two bolt pattern non OD pattern in 1991. Couldn't find a newer truck in the JY at the time. Not too much trouble. Driveline angle is the hard part. For that I had to cut, fabricate reinforcements and lower the center portion of the crossmember. Find an OD crossmember and save a lot of trouble.
