Beautiful truck. Love the tutones.
I like you're keeping it mostly stock. 72 was a capable and reliable truck year straight off the showroom floor. I had a 72 J-4500 but with the T18A trans and it was great truck. The inline fuse electrics can be a bit trying at times but overall a good solid truck. Be glad it's a 4500 rather than the 4600 or 4700. You won't have any issues finding rear D44 parts compared to finding D60-2 parts especially the non-existant 12" brake drums that came on the heavier GVWR models.