I havea 582 in my dragster, always been a huge APD alky carb fan, got this setup turnkey with a terminator from James Monroe and its deadly.
A carb will be slower then the injection .05-.10 sometimes more. A 582 conv headed motor is a basic tuneup for the terminator and James would hit the nail on the head from the get go. I know he did a 582 with the rfd heads on it this year from a fellow racer nailed that tune up.
www.killerrons.com
Good luck with whatever you choice, @ 1900lbs that setup should get it.