Urgent: Drum brakes question

[Lippyp]

I'm trying to sort out an order for rockauto to refresh all of my drum brakes on my 67. I';m confused as to what size brakes I have as there seems to be several sizes listed. I can't get to it at the moment to measure them and thought you guys might know. Its a bog standard 67 long fleet that left the factory plain jane with a straight six. Is it going to have 11 x 2" or 11 x 2 3/4" fronts? and what size are the rears? I need to order all new cylinders, master and wheel cylinders, new hardware springs etc and the brake lines I'll probably get made up over here in Kunifer.

I was hoping to get AC Delco where possible but they don't seem to list them for the front so whats the next best brand> Bendix? Raybestos?

I need a speedy answer as I need to get this ordered for delivery to my wifes hotel in NY next week!

Thanks