I realize that the Demon and Holley debate has gone on for years but I haven't seen much about the quick fuels. I have a speed demon 650 on my stang now but im not too crazy about it. Lots of tuning issues. I know the basic design of the quick fuels is a basic holley design but so is the demon. its crazy to think how many different opinions and results can come from the same basic design. Any info would be awesome guys! Also, does quick fuel make anything smaller than the 650 (in a 4 barrel?) i think their website isn't complete right now. Thanks again.