I like the 48's and 49's because the don't have wing windows and do have level style door handles. I like the 54's for the resale value of the grill parts since they have such a limitted production run. Other than that, as long as you save an old Chevy truck from a crush, any year is good. Ever consider building a 1 1/2 ton pick-up? There's a lot of the big bolts out there, I've got three working on the forth as we speak,
Scott