FAST EFI 1.0 question / help

[Steve67RS/SS]

I am having a hard time in one area with this, and was wondering if anyone has any ideas. At low end, traffic / stop light take off, type thing. it seems to be very sensitive, wants to die out, and sometimes does. Once over about 1700 rpm, and up, all is fine, great response. Seems to want to load up in traffic and take off. Ive tried richer / leaner can't get it figured out, and yes I am a rookie on this. I am wondering if cam / stall can have an affect trying to get it dialed in this area. Lean seems to be a little better, but then that brings the heat up in the motor. At stop light in gear idles about 950, cam is 570 / 554 lift. dur. 243 / 257 and 3000 stall. its a 496 BBC. it is great everywhere else, "pretty good" on start up. then on / off gas up to only about 1,600 rpm it wants to stall out, and will. Think the above can have an impact? I'm not sure what to try. Really thinking about going back to a carb. Thanks for any input.