Join Date: Jan 2015
Location: Injun Territory, 'Merica!
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As mentioned, no way to tell if transmission is a '64 or '65 "325" case Muncie, best one can do is ck the stamped date code & make sure it precedes the build date of the car in question. 325 cases are not that hard to find if date is wrong or an er is busted off. On the early small pin "704" & "325" case Muncies, one needs to disassemble & to carefully examine. Often, the 7/8" cluster pin hole has stretched & so many times, a previous "rebuilder" has attempted to peen the pin hole with a punch trying to take up some slop. This was a major weakness of the early Muncies. Years ago, I had a local contact who we had properly machine the cluster pin hole out, with the proper taper, to accept the late '65-74 Muncie 1" diameter cluster pin. Would follow that up with correct later cluster gear & sliders. Basically creating a small output shaft Muncie 4 spd, same strength as the late '65-67 "010" case, or '660" case Muncie.