68 brake parts

Hi Mike or anyone, I’m ready to dig into rebuilding the brakes on my 68. Not looking to go disc. I know you have covered this before but, one more time. The part numbers for the wheel cylinders show up as opposite. Napa shows your part as rear instead of front. So is the front 1″ & rear 15/16″ or other way around? Also are the front drums the same as the rear? Can’t fine a number for the front drums. All of your input would be appreciated. Only want to buy the parts once. Thanks, John