jwaters:
Start by picking up a copy of Classic Trucks magazine and requesting a catalog from every aftermarket truck supplier that has an advertisement in the magazine. Also, eBay is a good source for good quality used parts for your '64. I have bought and sold many good quality used parts on eBay. Make sure you know your stuff when doing so. Finally, do a search for 1964 Chevy Truck on a search engine like Google.com and you will get more links than you can look at in one sitting. Good luck with finding good quality used parts for your '64. Also, check in the Truck Parts Wanted and Truck Parts For Sale section of the Forums. I have found that to be a good source.
