Will the drive unit fit? I'm pretty sure gears interchange, minus the big/small circle stuff having to match up, but what about the actual drive body?? if not how about early t-10 or Saginaw?
Chevy made alot of parts that would interchange. Never tried a PG to Muncie before, but the Saginaw will work.
The stem on the Power Glide gear is about an inch longer, so you would need the to use the PG sleeve. I can't remember if that sleeve will fit the Muncie diameter wise.