Mopar M1 P4532852 question

Hi gang..well..its time to finish off my 340 build. I have a new M1 P4532852 that I believe is the equivalent to the Edelbrock 2176. I picked it up at our monthly swap meet for 75$. It has never seen gas, coolant ect. Just like new.
Now the question..is there that much of a difference in performance with, lets say, a Edelbrock RPM? I am running the Comp cams XE268, KB 10.5 hyper pistons, 904TF w/3000stall, 8-3/4 3.91 sure grip and TTI headers. Input appreciated. Thanks....


DO YOU STILL HAVE THE P4532852?