Well afaik jamma only covers a joystick and 4 buttons jamma + adds some more unified pinouts which are NOT standardized, but I'm not sure if there's a such thing as a jamma compliant racing cab.
Now there's JVS (jamma video system) but honestly considering it incorporates usb devices, I'm not really sure how interchangeable games are despite the claim that they are, thus why I didn't reply.