Some potentially helpful data from me...
It's been a very long time, but some friends and I used to run 1-2 pairs of CVS2 on various combinations of cabs off GD-ROM for up to 8 hours, never had issues.
Capcom I/O to JAMMA, GD-ROM
Namco JVS I/O, GD-ROM
Konami JVS I/O, GD-ROM
I'm far from an...