Real bad unfortunately. The RTC chip is completely corroded. Even if you fix all the traces to the ROM SIMM, all VIAs, all the chips, you'll never be able to start up from a SCSI disk again until you get a new RTC chip (and for the time being you need to get one from a donor board, so it's not very practical). And that ROM may be bad too.
I'd try to neutralise the acid as much as possible (on the board and probably on the chassis as well) and store it until you get your hands on a new board (either second hand, or a reproduction one when and if they are ever made).