6g is missing the 302, and I was hoping the rear seats in the 6g were going to be just as easy to take out as my '76. Frameless windows are kind of a bust too. Other than that... (y)
Search for Ford OEM parts online. Once on the Ford parts website, it should automatically have you connected to local dealers (mine did,) and search for what you want. Other dealers are doing the same deal. Out of state dealers do not ship to Oklahoma.
Welcome! I don't know of any clubs myself, and I don't think the OK group on here is very active. I do notice a few Broncos though on the east side of OKC, including a purple one!
A pressure washer (about 1200 psi) is all you need. Ditch the buckets all together. Yeah, the foam cannon is good, but not necessary. A good waterless wash is the way to go, unless your car is caked (that's what the pressure washer is for.)