John,
I got the transmission out of a 1985 or 1986 chev s10 pick-up from the local Pick n'Pull. Tag number is 1352-145 which has a .072 5th gear. I am using the original differential housing,just as a few others have done, but the ring and pinion assembly came out of an early 60's chev 1/2ton. I got the diff from a vendor who supplies new and used parts.
The transmission checked out O.K. I just had to replace the front and rear seal along with the tailshaft housing bushing for piece of mind. Since I am staying with the powerhouse 216,I figured the differential would be able to handle the task. But unfortunately that was not without new bearings and seals. Ouch!
Brian
Brians40