Do you know if they are still stock or honked up before you got them
I've used several different stock Holley 1050 CFM Dominators for bracket racing, the original List # 9375 worked really well for a single 4 barrel single plane intake on my bracket 440 motors with stock jetting ( either #91 or #92 (CRS ) front and back ) and no power valves
I'm planning on using them ( I have 3 or 4 of them now ) on my next big HP bracket B1 motor on a fabricated sheet metal tunnel ram intake also