Ah, would also look at the radiator cradle below and at the lower sides where the radiator sits in its rubber feet. Water/coolant will pool there and rot the cradle out. Had it happen to mine and ended up having to dig the whole cradle unit out and score a good one. The rear frame horns where they kick back out behind the wheels after going up and over the rear end will rot along the bottom seam where water gets trapped inside. The rear body mounts attached to those horns die easily as well. Used to be a big market for salvaging them off good frames found under the four doors and doing some replacement surgery to an otherwise good coupe frame. Firewall body mounts and under/beside the heater box if there has been a heater core leak. The firewall mounts are brutal because not only does the firewall Sheetmetal rot away, so does the hole/pocket in the frame because it is a location where crap thrown up by the front wheels tends to land and accumulate. You don't mention the regional location for your donor prize but anything north of the Mason Dixon Line is pretty much Rust Belt Central due to the states habit of throwing salt at the roads in the winter and the stuff loving to eat metal. Oh, yeah, if you can, lift the carpets and check under them. From below it might look okay but the carpet and underlay can trap water and moisture and cause issues.
Nick
