You night do better asking local shops. Labor rates vary regionally due to cost of living. Transmission price will vary by model of transmission and availability. In my area, I could buy a transmission from the junk yard for about $230. Then I would need the $13 shift linkage. On top of that, you need flywheel, clutch, clutch master and slave cylinders plus hose, clutch pedal assembly, etc. I would guess overall, around $500 - $750 for parts. And a full 8 hrs of labor.
But that's a very generalized ballpark guess. If your truck is filthy and rusty and they have trouble getting fasteners out, etc. That adds up. I believe part of the exhaust needs to come out to do the job. That can be a bear on old vehicles.