i am looking to purchace an old work truck a chevy c10 or c20 or k10 or k20 and i am wanting to make it look badass by putting some sikk wheels and tires on it. maby like some 20s or something

first i need to know the bolt pattern and second i need to know (where can i get wheels and tire packages for these trucks? and what are some that look good that def fit these trucks)