The saginaw I put in my truck a couple months ago was absolute junk, so luckily a friend had a muncie. One distinguishing characteristic was the extra bolt ear; it has 5 ears to bolt to the bell housing instead of 4. This doesn't matter because there is plenty of room. The only trouble I had was sliding the tranny into place that top ear wanted to hang up on the seam where bottom of the firewall meets the cab; that required a little extra finaggling. I just put it in yesterday, and it shifts like a dream!
Boo Radley