Okay, so I took apart my 73 domestic drivetrain apart and found that the the original 3 speed is much shorter than my SM420 by about 2.250" from face to face. The drive shafts will not work with that set-up especially when the adaptor plate is installed. The rear is slightly shorter than the front drive shaft so there is no potential for a front/rear drive shaft flip. I started this project with the assumption that I did not need to get replacement drive shafts. How much can I gain from a spring reversal where I move the front of the rear spring to the rear? Where can I get a longer OEM front shaft? I intend on using the original 3 speed t-case.
Thanks
Pablo
Thanks
Pablo