About the spare tire. 33 Years ago, I cut a rectangular hole in the bed for the spare tire. It was big enough to accept the tire but not so big to let it fall completely through. The tire just touched the "spray guard" that's part of the running board. The tire does clear the frame. These pics show it the best I can.
34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.