The Holley 850DP is calibrated as a track carb. It will be very fat for a street car OOTB.
If you are comfortable with tuning the cruise and transitions, it would work for your application.
You will have to lean down the transition fuel feed to get it happy at light part throttle cruise Try around .055 restrictors in each side on the primary transition circuits to start with You will have to drill and tap them to do that with brass set screws If you don't have the tools, skill or desire to do that your self maybe you should contact Thumper about one of his carbs or have him mod yours for good results I have four 4781 carbs. starting from a old non dash original to my latest one which is a 4781-7, they work good with jetting and modifying the transition circuits to lean them down
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Try around .055 restrictors in each side on the primary transition circuits to start with 
You will have to drill and tap them to do that with brass set screws 
