Have any of you or anyone you know converted a GM 350 with TBI to run on Natural Gas?? Any idea of the cost involved? How does it affect the power of the vehicle? I have been tossing around the idea of converting mine to CNG to try to save on fuel prices, but I will still need to be able to tow a trailer with a '76 CJ7 Rock Crawler on it. Honest opinions...good or bad...I want to hear them all!! Just remember, I want opinions about the conversion...not about how big an idiot I might be for considering it! If not CNG, any other ideas...maybe MPI instead of the TBI?? Thanks!!