[55 Chevy Dave]

And to finish off my weekend update... I mounted the front and rear bumpers and welded in the mounting nuts since they won't be accessible after the frame is boxed. Not the prettiest welds, but they will be forever hidden away soon.

The front bumper brackets ended up mounting on the inside of the frame while the rear brackets mounted on the outside of the frame rails as expected. I checked the assembly manual and this doesn't seem to be correct. I measured the frame width and measured it again. I checked the positioning of the brackets to the bumper and this is the only way they can be installed while keeping the frame rails parallel from front to back. I'm not sure why this is, but the final product is correct.