pony up for the pro-pain kit, it's worth the green. For starters, the regulator. It's got an input and an output gauge, and is the style used welding torches. The input gauge is cricital in my opinion, and I'll get to that in a minute. I'd like to point out that the pro-pain system is MAP based, which means it'll respond faster and provide a higher level of tunability in cab then the other system would. This is how I'm planning on building my progressive liquid propane injection system, if I ever get off my duff of course =) as it'll provide a superior tunability as well as being configurable from in the vehicle which is a plus unto it's self. Just a warning though, be careful of the tank's level. If you use propane in a system like that it'll draw off the top of the liquid and the liquid can freeze over causing a pressure drop. High use, a low tank level and cold weather will aggrevate these conditions. For quick bursts I doubt it'll be an issue, but watch the tank level carefully and if your tank starts getting frost on the outside of it stop using the system till it warms up and get your tank filled.
