I think that we all fall into the "trap"....a parts catalog....an "800" number....a credit card number and our parts are delivered to our doors in 5 working days or less. This is good, isn't it?
Maybe good, but is it resourceful? So what happens when the mail-order part isn't up to par, or you have a problem out on the road? I'll bet Tempe, Arizona has a few "auto electric shops" as well as other parts suppliers, especially for the 50's and newer trucks....my NAPA store got me a 216 valve cover gasket, and an "early" waterpump in two hours at a competitive price.
The point I'm trying to make, is that if we don't take a little time to explore local resources for our parts, it won't be long until we have "no choice" but to go to the mail order houses. Local businesses offer special services that some "drop ship" facilities can't. I believe in giving the local guys a shot up front....if they can't provide the part or service then get on the phone and keep your fingers crossed!!!!
You might be pleasantly surprised, that there are folks out there, who have plenty of experience, a network of their own, and who are willing to meet your parts needs. "Keep'um rollin"
Dave