Sounds like an interesting truck. Post some pictures sometime if you can. When checking on the Fender Extensions you need to know which one to ask for. There were Wide Fenders and Narrow Fenders on those trucks. There are actually Truck Junk Yards everywhere, but you'll need to do some searching. Many aren't listed anywhere.

Keep us posted.

Bill


'60-'72 Chev/GMC Fan
GMC 9500 Fan
Detroit Diesel Fan