Registration and Posting Agreement
I am sure you've read thishttp://www.superchevy.com/how-to/transmission/1607-how-to-identify-a-muncie-four-speed-build-date-codes-vins-and-input-shaft/
They are super durable on the circle track. Lots of info on ratio's and such, folks offering them without a first gear for weight reduction. I tried looking for a Muncie transmission history book on eBay and there were a few but are geared toward 4 speeds. I am fairly sure I have a 3 speed out of a 79 GMC1500 in my shed. I plan to look for it this weekend.