Ok, I bought the mounting hardware from NPD to mount my radiator to the core support.
The kit has two 3/8 bolt which are used on the passenger side (simple enough).

For the drivers side I have two rubber grommets which have a threaded brass shaft inside & matching bolts. I can't figure out how this is supposed to work. There is nothing to hold the radiator to the core? The gromet will just slip through the hole in the core.

Thanks,
Steve

Insert the rubber bushing (well nut) into the core support. Line up the radiator, and thread the bolts into the well nuts. As you tighten them up, the rubber will exapand to hold it into the core support.

Thanks,

Somehow I thought that was going to screw up the new hardware but it worked great. Thanks fo the help.