So ive been thinking about switching to propane. i like the mpfi i have now but ive had a few problems and its a pain to tune (for some reaons i cant get the diagnotic port to work) i have a 350 block sitting aorund that needs some work and i was thinking boring it .30 over and then doinng propane. so far ive been looking at the techno carb kit. http://www.technocarb.com/brouchures.htm (the 4v offroad kit for pre 87 vechicles) I like the fact that it runs at any angle, almost no tuning and no fuel pump. so a few questions. There are some people who run propane/ gas, how did you accomplish this? what type of setup do you use? what kind of mileage do you get compared to gas? what did you do for a tank? how much total did your conversion cost? thanks guys, i appreciate it!