U BOLT SIZE HELP!!!! 98 chevy blazer ls 4x4
 

How do I find the specs for the u bolts. the vehicle is at my parents house and I cant get my hands on them to order the parts for them. Is there any diagram or anything to where I can find the exact specs for them? I am going to order the parts and get them shipped to their house before I take a weekend to go down there and do the work. Any help is appreciated thank you guys so much.