I recently bought a 70' GMC Custom Camper Special half ton with the camper package, like your's. It has the 350 tranny and a 350 Target Master Motor (the first version of the goodwrench engines, plain jane, haha). At one time it was bluish green, but now primer black. Mine has factory a/c, does your's have that too? You'll be able find what you want. Check craigslist every day using keywords like chevy truck or gmc truck. Also try checking the craigslist for neighboring cities. Thats how I found mine. Have fun and welcome!
