Hi Paul, except for the added reinforcement in the jam, the Blazer door is just a truck door with the window frame Sawzall-ed off as best I can tell. Do you know any different on this? (I am planning on putting a set of truck doors on my Jimmy, but wasn't in a hurry. I traded the extra set of Blazer doors I had for a complete 70 GMC truck)

I have taken both apart. I have the vent window assembly from a 70 truck in my JImmy now on the drivers side.