U bolt size and tire question
I bought this truck from a young boy and it has a 4" body lift on it . I am older and want to lower it to original height. My question is what size u bolts do i need? I need the length, are they square or round, and diamiter. I appreciate any help you can give me. Also it has big tires 12.50"s i believe on 8 " rims. Can i put 245/75/15 on the 8" rims? I know the door says 225/75/15 would 245s be too big? Was told the 245s 0r 225s would look funny on an 8" rim. Thank you
Jack