Hey Brian's40, This is real good information for me. Just what I needed to hear. Initialy I will run it on gas and then maybe propane. The new hydrogen fuel cell trucks and cars coming out I think use rather high compression. I wonder if older rigs can be made to run on it with some tinkering? The problem is the cells are very pricey and where can you get the fuel? Perhaps someday in the near future something like this would be possible. In the mean time gas or propane will work just fine. I probably go with a stock cam and possibly putting in lump ports. It would increase the flow with going to larger valves or cam. Is this a good idea? Should I stay with standard exhaust valves or go with the next size up? I have 3" exhaust to run it through which is plenty. Should I use a one bbl carb or two singles or one small 4bbl? I mainly looking for economy but do need some power. The 292 was good on gas when hooked to highway gears otherwise thirsty like the one I had. I think mine had 4.11 gears. It ran real well and I loved that truck which I should have kept. It was a 63 3/4 ton full size. Had a 4 speed in it. I really do appreciate what you have shared. This helps out a bunch. Where I used to work we had a small fleet of Chevy and Ford vans all with 292 or 300 inline sixes. The company just had them converted to run on propane with no change to the engine. They ran pretty good with 8:1 but as you mentioned loss mileage. The power was ok but less than gas. Not too much less. The chevy lost only 1 mpg. From 14 to 13. I'm not sure about the Fords. Henry
Last edited by Henry G; 11/17/2007 9:42 PM.
