Check out the mar-k.com site. Lots of info on truck beds. My truck is not with me but as I recall there are no cariage bolts through the front bed panel and rub strips. Abut 2-3 inches back a brace goes under the bed wood and that is where the carriage bolts are including the two large cam washers and bolts to bolt the bed to theframe. mar-k had most of the dimensional information.
