Ok replaced the TC74AC14F (IC303) and the NJM311M (IC302) in front of it. The new logic IC gets hot also.
This amp had extensive damage to all of the voltage regulators so it didn't seem out of line that this IC could be defective.
I have clean audio signal up to the input of the NJM311M I replaced so the only other IC I suspect damaged is the TND505MD drive IC.
I have the service manual if you want / need a copy.