Difference between 1967 and 1967.5 4 spd. Tranny?

[DAC21]

I picked up a free 4spd tranny yesterday that was advertised as coming from a 1967. Well upon inspection today I noticed that it appears to have the Tranny mount for a 1967.5 (threaded studs) Other than the mount are all things identical to a true 1967 Tranny?

I mainly wanted this as a possible back up as a whole, but for sure for the tail shaft section. My Tranny when parked decades ago had a leak from the tail shaft output area. Maybe a seal, maybe the bush (good luck finding that) BUT THERE WAS a chunk of the tail shaft casting knocked off right at the end near the seal. It may or may not have been the oil leak issue. For free other than gas and a small donation to the provider I figured no harm picking it up.

So the questions are:

1. Will a 1965-1967 tranny mount bolt right up to the 1967.5 tail shaft housing (same bolts / thread?) and drop into the crossmember?
2. Will this 1967.5 Tail shaft housing bolt right up to my 1967 tranny case. (same bolts and threads?)
2. Any linkage issues?

I think I'm good, but I'm sure someone has probably worked through this issue previously and thought I'd ask.

Thanks<p>

What I picked up:

tranny resized.jpg

[JT68]

Other than fasteners, 66/67/67.5 should all be very similar. Earliest transmissions were SAE threads, 67.5 (or somewhere around there) would switch to metric. ALL years are technically interchangeable for primary functionality.

[spl310]

If things are undisturbed, the ribbed bottom pan usually means SAE threads while the steel pan metric threads. As JT said, the 67.5s should have been metric. The only really big concerns are the bolts that hold on the mount and the slave cylinder.

[jrusso07]

I had a similar experience; I had a bad 66 4 spd transmission (extreme counter shaft wear caused shearing of gear teeth) and a decent 70 transmission. I used parts from each to make one good trans. The internals are the same (warner and servo difference aside). The later studs are much easier to mount to the cross member as compared to the through bolts because of poor accessibility to the bolt head. The slave cylinder mounting bolt spacing is different. I didn't realize this until the unit was back in the car.