Perry,
This site is so full of useful information that it is usually overwhelming when trying to find something.
All the well-known vendors of parts can be found by going to the Links section (there is also a Links button at the top of every page of this forum).
Then click on
PartsThen scroll down the list of vendors by years,
Jim Carter sells parts for 34-72 trucks and and
Brothers sells parts for 47-72 trucks.
Some vendors have good photos. And, by looking at a few vendors' on-line catalogs, you can get an idea of what parts work for different years (American Classic Truck Parts, for example) and work on different sizes of trucks (Jim Carter, for example).
Whenever you buy any parts, request a free hard copy catalog be included in your shipment.
Another overwhelming section of this forum are the Tech Tips. Take a look and get an idea of the types of advice, experiences, and tecgniques included there.
Tim
American Classic Truck Parts provides monetary support so this forum can exist. Most people report that most vendors provide good service most of the time. Any vendor might have defective or low quality parts but competition works in our favor, and almost all vendors will make good on a defective or unsatisfactory part.