OK, I think I am sold on it being a burb. I was going by the same thing that hgs_notes was going by... but, this pic;
in the back where the rear cab portion is grafted on.... just like you said....
Is there a model number in the glove box SPID label?
As far as the clearance lights go, they aren't 67 - 72 originals anyways.
again, not trying to pic your rig apart.... that sucker is baddass.