i have stock blue 500 hp carbs drilled out and are about 920cfm, and need rebuilt my motors are appx 600hp i spin them 5600 with 741 crane cam was thinking of going with dominators what do you all think. looking fo a good idle and more power.

Tough call. However, I think you should send yours out to pro systems, nickerson, or chuck nuytten, and get them redone if they are beyond a renew kit. Your carbs should be enough to support what you have i.m.o.

If yours are flowed up to 920fm, then that is plenty. Dominators would be too big and are not needed until you get to 540ci or so. You would lose throttle response with too big of carbs.

Did the carb 500hps come with 800cfm holleys or 750?

I have 2 hp 950 that im thinking about selling

I have heard that the 500 came with 800cfm carbs. However, it has a 1-11/16th butterfly base plate. That tells me it is has a 750 CFM. All the 800's that ive worked with had a 1-3/4" butterfly. Now another factor is the venturii diameter and horn angle. All of which plays into the cfm rating.

How did you go from stock to 920 cfm?