Like many before, I am getting ready to assemble my bed. I have the 3 sides and tailgate mounted and supported over frame. Mine is a short bed so I believe there are just the 2 cross sills plus the rear most sill under tailgate. One of the cross sills has integral spacers on it where I believe the mounting bolts to go through. The other is just a c-channel. I see pictures online of brackets that have slotted holes and look like they clip into the cross sills. Are those required? If the one sill has them integral, are they still needed elsewhere? If I do need only those, anyone know a source that sells those alone? These parts have been sitting for nearly 20 yrs in my uncles garage. I have the wooden blocks and rubber plus hardware. Thanks!
