I have a Muncie M-21 ? transmission I want to use in this 350 car. It has a 10 spline input shaft, the speedometer cable hook-up is on the passenger side, the gearbox casting number is 3925660, with 13, and 2 above the drainplug. The tailshaft housing is casting 3857584, the only thing that looks like it might be a serial number? is on the right rear side of the gearbox. It is, 29P361437 also, P9B27A
Is there any way to know what year/model this trans came from?
I went to buy a clutch & pressure plate today and i'm not quite sure what to buy. Is the ten spline correct for 1970? The parts book lists 10&1/4" clutch plates, and also 11" plates for 70 GS 350. I did buy a pilot shaft bearing. I had a choice between bushing, and bearing, so I opted for the needle bearing.