If you bring a metal brush with you the next time, get down on the pass. side front frame rail, and you'll see the Identification number. It should be something like 'CC 101 2****'. Post it up and we'll tell you what it is for sure. It should have a 228 GMC motor in it (unless it's Canadian) and either a 3 on the floor-synchronized, or a 4 on the floor-non synchro. If it's a 4 speed it will have a lever and rod to allow reverse to be engaged, right on the shift lever. No lever/rod, it's the 3 speed. You'll notice 2 wiper motor shafts. Standard on a GMC. Pass side was optional on a Chevy. Check out the bed. It's probably metal-get a shot of it when you go. It would be standard from the factory that way.
There are some shots of my '45 in my album here.
http://community.webshots.com/user/apacheclimber
