1979 gmc sierrra grande crew cab 3+3 Camper Special

Here is my 1979 GMC Sierra Grande Crew Cab "BIG BLUE", I have owned this truck for about 18 years, engine was rebuilt by Parsons speed shop in Dayton, Ohiowhen I first purchased it, all name brand parts were used, RV cam installed,suspension was rebuilt by Acme Spring in Dayton, Ohio.I ran it hard for years pulling a Bobcat trailer and also an enclosed car traile, it now has a noise in the engine, don't know if its major or minor, missing some of what's needed to mount the fifth wheel, the usual Chevy truck rust, drivers door is a pain to get closed all the way, the others work fine, speedometer and odometer quit working a long time ago, I would guess that there are about 50,000 -70,000 miles on the rebuild, I rode it hard and it took it like a champ, it will start up but as I said before it has a noise in the engine, dual tanks,fuel pump rod is stuck so I went to an electric fuel pump, been parked for five years and still started right u, will have to be towe, brake light is on.