That would be a cool project truck but the Mack B model is the FJ40 of the older Mack’s. Way too easy to find parts for and popular for me to consider.here's something else to consider
So I was digging around my pile of junk looking for something to make a top from and just for poops and giggles I ran a file on my second chunk of ground plate and it was dead soft. They where use together on a press I bought and I can’t for the life of me think why the one is so hard and this one isn’t, anyway I got it drilled and tack welded in place. Hopefully I can get it welded up and make the aluminum top and move on to some Land Cruiser maintenance.