That's true Tom but you're comparing apples to potatos.
Different generation trucks, different cabs.
Seems a lot of people posting in this thread are under the impression that the AMT trucks are the same generation as the ones coming from Moebius ,, that are not the same generation. No body panels are the same.
These two 'generations' share a lot more than most people think, Steve. As the owner of several of both types of these trucks I've done a lot of measuring and comparing. The cowl/windshield areas and floor pans are very close to being identical with two inches added to the cab length behind the doors/seat on the 73-up cabs. Windshields, carpets, seats and most mechanical parts (i-beams etc) interchange between these. The 67-72 dash was still used in the heavier 73-79 F600 and up series trucks and a popular swap into the older trucks is the rad support and galvanized inner fenders from the newer ones, mainly because of scarcity of the older parts.
As far as what Tom says about the AMT cab, he's right about the windshield opening being too short and I might add, the tops of the doors seem too high as well.
Those mock-ups look great, Dave. Hope those rear side marker lights don't get left on the '69 box (not that they wouldn't be easy to fill in) and the roof looks a little soft but it could be the angle the pics were taken in.