Hey! Nice to see a fellow minnesotan!
I'm not sure on the sm465, but the original trans was the saginaw 3-speed.
I put about 4,000 or so miles on the truck when I first did the big block swap years ago.
I did a frame off resto on it about 10 years ago, then once it was done, I never drove it.
I'm back in the game now, I just want to tidy up a few things I didn't like during the resto, and get back to driving it. Maybe we'll see you around.