Can I test a Space Duel PCB in a Black Widow cabinet? I understand controls won't be working (of course) just wanted to see if I could fire it up to verify it runs...
I always like to defer to someone more knowledgeable - but I'm pretty sure they are compatible (except, like you said, the control panel).
I can't remember, either gravitar is a ROM change for BW, or vice-versa. I think all three are safe to interchange.
I remember finding my BW PCB in a box from an auction and thinking "I've never heard of it" and a few years later (on RGVAC, I believe) someone told me to plug it into my SD to test it.
I still haven't played it, all these years later, due to not having a CP.