Factory Propane Conversion Setup

[Propane350]

So, a million or so years ago it seems, I had my first project truck. A 1972 Chevy C20 Longbed. I purchased it for a few hundred dollars off Craigslist, but to my surprise when I went to check it out, it was running completely on propane. I'm a sucker for one-offs and novelty items so I snapped it up quick and drove it around for a few years without changing a thing.

One day I decided to take off the stupid aftermarket glovebox door that was on it and put back on the stock one that came along in a box of misc parts with the truck. When I flipped it over I saw that it actually listed the propane tank, heater and carb on the inside of the door, along with the HD shocks, clutch and rear end. The VIN matched as well.

I had never heard of Chevy putting alternative fuels on their vehicles until recently with the flex fuel and bio diesel and all that. When I replaced the engine and switched it back over to gasoline, I kept the whole setup, short of the tank.

Anybody know anything about it? Worth anything? Did it -actually- come from Chevy like that?

I've been very tempted to pick up a total beater truck just to throw it on. I was getting nearly 18 miles a gallon on a 350 when I first had it set up. And some places give highway discounts for using propane. At the time I was only being charged about $1.16/gallon. You loose a bit of the get up and go, but more then make up for it in the wallet.