I subscribe to Petersen's 4 Wheel and Off-road. Anyways, in the Feb. 2005 issue, there was a little write-up about propane retrofit for a carbuerated engine. Their website is www.gotpropane.com . Anyways, I was wondering if anyone has done this, or knows anything about propane engines. Are they economical, get good fuel efficiency, etc.? They claim it won't stall on an incline, which will be really nice for those hillclimbs. Check it out, and tell me what you think, because I don't know that much about alternative fuels.