I think we are only hearing part of this story.
I have a customer that has a full -on 565 pro street BBC with a very stout mech. roller cam 275 at .050.
He runs a Force fuel injection unit and the car will start very well and has a fair idle at 1,250 rpm's.
He switched from a flowed 1,050 dominator to the Force fuel injection and picked up a lower idle speed and better driveabilty along with better throttle responce.