[Robert1970C20rstbukt]

greywuuf, you're welcome. I was looking for pictures of other trucks built by National Foam from Chester, PA and found several GMC 8500's they built from the late 60's to early '70's. The rear body/tank on my truck is identical to the truck in the picture, so at least I have a reference to how the truck was built.

Bill, it does have the factory 478 Magnum V6 under the hood. It has close to 14,000 miles and about 750 hours on it. Over the years someone replaced the original Stromberg WW carb with a Holley, and replaced the oil bath filter with an Edelbrock racing filter. It always fires right up and runs great, plenty of power to haul 1200 gallons of water around and the pump still works great on it.

Here are some more trucks I found. The first three 8500's were built by National Foam, the last one was a shop built truck and is a 7500. I believe all of them have the 478M V6. The first truck is a 1969, the second two from the Joliet Refinery are 1971's, and the last one is a 1973.