WOULD it be cheaper to run a 1989 Chevy Corvette on gas? If so, how much it will cost to install?
IT WOULD be cheaper to run on LPG, but the cost to fit LPG may be too high to warrant the change. It's not a normal installation and will probably need a lot of custom work. Get an expert to determine the problems of fitting the tank, air ducting for the intake and the suitability of the intake manifold.