Stock 1972 C10

[SecondGeneration]

New to the forum, and been on message boards close to 20 years now so I know how this all goes with the search function, but not for nothing, this forums search function isn't the most user friendly.

Recently picked up a original paint 72 C10 Custom Deluxe and trying to return it back to stock after the previous owner(s) put some aftermarket parts on it.

Any help or direction would be much appreciated.

• My truck came with rally wheels but I want to put the stock steelies with hub caps. What's the stock 15" wheel and hub cap combo? Offset? What should I be looking for when finding a used set on the web or at the swap?
  Pretty sure the custom deluxe came with the full chrome cap, and the others came with the center "dog dish" hub caps?
  
• What's the stock tire size that would have came from factory?
  It came factory with the 350, disc brakes, 5-lug and springs all around if that makes any difference for the questions I'm asking.
  
• Does the 67-68 steering wheel bolt right onto the later model columns? it came with some mickey mouse racing wheel, and if I'm going to switch out I like the earlier steering wheels.
  
• I'm sure most step bumpers look alike, but what's the factory step bumper look like? The SPID stated it had a step bumper originally installed.

Thanks!

Here's a pic the day I got it.