IS THERE A CHANCE i HAVE THE WRONG MEETERING BLOCK ON THIS CENTER CARB?

Do they have a specific part number for the meetering block, The number on mine is 34r-7235b, I have a metering block off of my 4150 750 holley. Will it work? also this meetering block have the vacume tube port on the side, no tube inn it, but the port is open.

Kasey