2 questions need help!
hey i have 1979 gmc heavy half i am in need of a brake booster and when I go to parts store there is 2 types jb5 and jb3 and i have no idea which one goes on autozone says it will be un the glove compartment on the tag it isnt there and it isnt under the hood.. how do i find this info out my brakes are almost to the point they dont work at all so immeadiate help would be appreciated.. and also what is the lug pattern on this truck i am looking into buying new rims and i need to know what im lookin at also what the biggest size tire i can put without rubbing.. thanks guys!
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