Most of what I know came to me long before there was such a thing as a website. A good start for info will be your local propane company. Another source is Ak Miller, (310)949-2548; he has built a 700hp ChevSB with twin turbos.
The basics are that propane is 110 octane, creates no carbon when it burns so the oil never gets dirty, and the exhaust has zero HC, zero CO, and 1/3 the NOx you get with gas. It has fewer btu's per gallon, so around 10% less power. I was getting 18 mpg with an underpowered 230. Not as available as gas, and your car will have a slight aroma of cooked cabbage. The fuel delivery system is different, but actually very simple, & since LPG is a gas in its natural state, no need for a choke, no rich/lean issues. It starts when the first plug fires, every time. The cost per gallon is usually close to gas - sometimes a bit lower, sometimes a bit higher, but I'm not sure you can buy 110 octane gas at any price.
