Big cams are tough, the IAC settings get tricky with the gain and amount right. I had a .738 lift cam with 283* duration at .050 in a 484 Hemi.
It was a pain to get the engine to idle well and transition well without surging. In gear vs. out of gear, & cruise vs quick stop. Essentially I used the IAC settings as low as possible without adding fuel as rpm varied a little. Need to set the throttle blades to get some air without the IAC. I messed with this when the timing curve wouldn't keep it from surging. My throttle blades were big and made this very touchy...
So FAST 2.0 or Holley Dominator, maybe the XFI sportsman...Yes you want a laptop tuneable one.
https://www.youtube.com/watch?v=9tHA9t2U8-Yhttps://www.youtube.com/watch?v=-AXRHXSV5Jc
