I am thinking of converting my 3.8 buick to propane. What I want to know is what are my options as far as the propane fuel mixer is concerned. On lances write up in the tech section he described it replacing his quadrajet, but I don't need that much fuel flow. Are propane carbs universal and can be adjusted infinately, are there different flow rates for different sized engines?? I guess I'm just a little bit confused as to the similarity between a propane carb vs. a gas carb. Any one have any expereice??