I hope this helps save someone else the trouble I had getting a trailer hitch to fit my '72 C20 with a step bumper. I bought online and got every important measurement right except one, so I had to return it and order a different one. Don't just trust the website that says it fits!
These are the important measurements to consider when getting a trailer hitch for a truck with a step bumper. You will probably have to call the manufacturer to get these, as they are usually not available with the online specs.
A - Make sure that the hitch will fit between the bumper brackets
B - Make sure that the bolt holes will line up on the center of the truck frame
C - Make sure the hitch drops far enough to fit beneath the bumper
D - Make sure the hitch sticks far enough out beyond the bumper
Other tips:
- Look closely at the online pictures of the receiver you are considering to make sure the design works with your bumper.
- Consider the realistic towing capacity of these old trucks. Class IV is probably good enough.
- Shop around. I found a wide variety of prices online for the same part number. Amazon and eTrailer are good places to start.
