Right on. That's kinda what I remembered from way back, and yes I bought new grade 8 bolts to retain the proper strength. The old bolts had five lines, which meant grade 8; the new bolts have six lines with 'JH' in the center, so I guess that would be grade 9? I don't know. They were six bucks a bolt tho!


1965 C60 school bus | 1967 GMC 6500 school bus