4 to 2 bolt master cylinder

This has probaly been ask many times. Please refresh my memory. I put all disk brakes on my 67 barracuda & bought a newer style aluminum master cylinder. I have to get the plate to go from a 4 blot to a 2 bolt. My car is an originally manual brakes & thats what its going to stay. Now can i use the original brake push rod or di i have to get a longer one because of the plate ?