1968 Chevy Pick Up Brakes

[jackwalkeasy]

Hello, My name is John. New to this site. I have a 68 pick up. I,ve had 3 other 68 pick ups. So I know a little somthing about them. But their is a lot I don,t know. So I,ll have more questions than answers. But have will have a few answers.
All the trucks I,ve had. And the one now are C-10.
So this is my 1st issue.
Years ago when I would buy brake shoes. Thier were two sizes. I had always needed the smaller kind. I never knew why thier were two sizes. I figure that perhaps the larger size were for a C-20.
On the truck I have now they are the smaller size. But I want to change to a bigger brake. And their is another issue.
I have rally wheels on this truck. And my lug nuts keep braking. And I think it is because of the rally wheels. I have a 6 lug wheel with 7/16" lugs.
So I want to change to a bigger and stronger wheel with 1/2" lugs. And use the wider brake shoes. Now is my thinking correct if I get front wheels and drums off a C-20. And put them on my C-10. Will they fit right on. And do the C-20s have the 1/2" lugs?