This is exactly correct. Be sure to specify a drum/drum MC - visually the two bowls will be the same size.
Also if you can get a MC that does NOT have the push rod installed! They are a bear to get out, some remanufacturers put them in, some don't; get one that is just rattling around in the box. As mentioned above, use your old push rod.
You can usually find someone in through the VMF want ads that will sell you a distributiuon block (any 67 to 73 one from a Ford car will work) for a reasonable price.
John Harvey