[Animal]

And GMC's mean "Got a Mechanic Coming." The only reason you find it so difficult to work on Fords, is because they are different then GM's. Brakes, are pretty much brakes mind you.
When I built up my '67 F100, I pretty much had to do a frame up. Brakes are manual drums front and rear with no power. So, I'm doing the front brakes, and realize I need new wheel cylinders, so off to the local Lordco I go to grab the necessary parts.
I get home, and what'd'you know, one of the cylinders doesn't fit, but same part number? It turns out that the shoe's I got, don't fit on the other drum, but they seem to fit fine on the one I can't get the cyclinder to go on.
Turns out that the one side required the wheel cylinder from a '65 and shoes from a 67, and the other side took a cyclinder from a '67 but shoes from a '66. Nice, huh! Luckily, my local parts guy knows what he's doing, but try explaining that one at your local Canadian Tire!