Hi namba209 sory I mist your post, true cost is a big isue, Propane has 80% btu compared to gasoline. $1.20 to $140 a gallon to $2.50 to $3.00 I think that ought to cut my weekly driving costs in half. And it is hard to say as much as propane is quite natorious for it's smell, but it is much better for the environment. This world would do much better if we all drove on a deverse aray of fuels, to say nothing of making it much harder for Oligopolies / Monopolies to decide how much money "WE" are going to have to do without this round.
As for power, true I don't forsee 80% surpasing, but efficiency, propane being a gas verses a liquid is easer to get a more complete burn, well enough tweeking and you get a surprisingly competitave propane dragster as written up by one of the members of my Propane Conversions WebRing.
jtb, ya they use to be pretty common out this way too, but they have all seemed to disapear.