for the record I am a big fan of the quadrajet and while im sure there are those much better than myself, I am quite good at tuning them, but im getting frustrated with poor manifold choices and being stuck with adapter plates. does anyone have any experience with the street demon carbs? they look like fairly decent carbs. one thing i don't like is that the metering rods are stepped intstead of tapered. i would be looking at a 750 to match the cfm of my quads. the next carb i need to setup will be going on a big block mopar to replace the feedback thermoquad that is currently on it, if that matters at all.