81-84 4 speed manual in a 67-72

[davidh]

Okay a few days ago I saw a thread where people are talking about manual trannies. One person said they like the 4 speed overdrive manual from a 81-87 truck. I think I know where one of these is laying and I can get cheap.
some questions
1. Is the tranny compatiable with the stock clutch or is it hydraulic?
2. What's the ration of 4speed final drive? It says OD on the shifter. Most 4 and 3 speeds share the final ratio (1:1 I think)
3. This tranny is behind a 6cyl my truck has a 6cy but I may go to a V8 later will it handle this okay? Is it a light duty tranny?
4. Who else has done this with their truck? What tranny mounts were used? and changes in drive line? Shifter mount okay in the truck? Any issues and how did you like it?

A overdrive would be great. anything for a little extra mileage.