Nice work! The rear bumper for a 48 Chevy fits the front end nicely. Picking both up at the swap meet for $40 was a good deal. Also new one are like $159 new from LMC truck parts.
What are you going to run for wheels? The standard 60s' cap fits the spare steel wheels but isn't too blingy. Gonna do the rotor and axel swap to get 5 on 4.5" bolt pattern on mine. They make torq thrusts 5" wide with a 3.2 backspace.
The rear fenders need a big tire to fill it up. Have you done a mock up on this yet?