I have a 1969 427 with aluminum heads running a comp cams 268 flat tappet cam. I installed the fitech throttle body with the fuel command center. I'm struggling to get it running well enough to drive it for the first time. Its running super rich, and is hard to start. After it starts it idles well (820 rpm) but after warm up if I turn it off I can't get it to start again. I've read about deleting the float in the command center but I don't know if that's the problem ? Who can help ?