In all honesty - you have nothing to lose. The RAMs are the first chips that will be affected by any corrosion... the sockets may have saved the actual IC's from being ruined, but they might just be floating due to the traces being eaten away.. so any RAM settings would be lost already.

IF you have corrosion then it needs to be fixed up before it gets worse - mine didnt look too bad, but once the green film was taken off the board to reveal bare traces it was astounding just how far the rot had travelled.
IF the RAMs are eaten away, i have some 6514 here and 2114 are easy to come by... seem to be on every arcade board from 80's era

Am i right in assuming that your board boots sometimes on the bench but not in the game?