If you're planning on using it more like a modern truck I'd probably get a newer truck and get the old cab put on. Trucks in the '60s are pretty cheap and you can make a 235 look like a 216 (though it's still a year newer than the '36 cab would be). I think you'd be in the hole less if you just found the cab you want and put it on a running '60s rig than changing the '36 and leave that for someone to restore. Or heck, you might just end up liking the cab of a 60's truck anyhow! I have much respect for a quality resto mod, as well as a fully restored rig. Figuring what makes the most sense for a specific truck can be hard, but as I get older I gain a growing consciousness of the limited number of originals, but I also like seeing trucks that "should have been scrapped" saved in any means possible!