Hi Guys: I have a 1952 GMC 1/2 5 window. I LOVE this truck....but to get to the point, the master cylinder appears to need rebuilt. They list 2 different kits for that year. As I am driving the truck daily I don't want to take the master cylinder off twice (Once to identify, and again when the kit comes to rebuild) Is there any way I can tell which kit it takes without taking it off? Terry1218
