Thank you all for the great information supplied. Thank you Dan for the pictures you posted of the NOS core support and the proper rubber cushions for it. Went to the garage and looked at mine again, now I'm really confused. The support on my truck does not have the special bent plate (riser piece if you will) at the bottom where it attaches to the frame. The channel of the support goes right down to the truck frame cross member with one rubber cushion in between (cushion badly deteriorated). Not sure what's happening there, I know that core support plays a big role in keeping the front sheet metal in check. The truck has been in our family since new, I'm not old enough to remember the early years of the truck, but ever since I can remember the front sheet metal has never been off. I'm handy enough to make that special riser piece and add it to the support if you guys think it should definitely be there. Just one more thing, where does the second rubber cushion go, I know there is one between the frame cross member and the core support, but does the other go on the top under the bolt heads? Again thanks for all the information so far, it's a great help!
Tom