In that case it's bog standard 60 Hz VGA. AFAIK, you'll only get that out of the Quadra 630 and up off built-in video. NuBus Card time, can't think of a PDS card that will output 60Hz at any res offhand.
I'd check the LCD/Mac Compatibility thread for details on what's already been tried with what results.
Short Bed TAKKY Hack gone Quadra 630 + (external )Analog Conversion Box = Digital B&W TV for your SmoochyMacHack too! Video Connector I/O Board is perfect for internalizing your connection, there's plenty of cubic and that clears the backplane DA-15 punchout for your stalled KVM setup as well.
p.s. I know somebody who has everything but a spare Classic Chassis to mod the @$$ end and a spare RoadApple PPC to use as packing to ship a certain Video Cable your way as well. He owes you big time. :I