Here in The Netherlands 80% of al the american cars ran on LPG because gasoline is expensive.
LPG cost a third of the price from gasoline.
An engine specialy built to run on LPG produces the same hp & ft/lb as a gasoline engine.
Important is that you buy a good lpg system, evaporizer and mixer.
I prefer impco, others says that OHG is the best.
With an impco system you can switch back to gasoline if nessary, in a moment.
But i don't know whats availble in the US.
good luck.
