Jim Carter has lots of parts and info for the areas of your Big Bolt that are common to the lighter duty trucks (more parts are common than you might think). For the other stuff, I would try NAPA or a local AC Delco shop. There's a small Delco parts shop near me that has been a real lifesaver for my COE project.
Two quick tips:
1) If you have a question, try to make it short and sweet. Sometimes it's better to put your question on a new line so that it will catch your eye as you scan down the page.
2) Use the Search feature in order to find all the good stuff that's been said before. Lots and lots of great stuff to be found here.
Good luck with your truck, Fil! Be sure to check back often for replies. I'm sure the other 'Bolters will get you pointed in the right direction in no time!
