Looking for a little info 49 Pickup

[FortyNiner]

That's a fine looking truck, Art.

The pulleys for the trucks are wider than the cars - might be the cause of your belt sizing issue. Brakes, fuel line, and other minor stuff for a solid bit of old iron. I'm guessing that the dual exhaust will prevent use of the under bed carrier for the spare. That and the size difference with radial v. bias ply widths.