Just got a 727, need advice for a refresh

You will end up with a very short driveshaft, and you will have to make the driveshaft tunnel bigger for the bell end of the GV tailshaft housing and the GV unit itself. You will need an aftermarket shifter also, but that part is easy.

:thumbsup:
How much bigger does the driveshaft tunnel have to be? Just some massaging with a hammer or something more extensive? Thanks for the insight.