Inside the cabinet.

Here you can see the inside of the cabinet. On the right there is the Capcom SFII-pcb, with the Jamma-X connector on it. In the back you can see the power-source. I will need to borrow a multi-meter to see if I can connect a pc-motherboard to it.In the top of the picture you can see a bit of the arcade-monitor.
[update: It's a no-go for re-using the powersource]

There is plenty of room left for a motherboard, a harddisk and the various cards, I however need to decide for myself where and how to mount the motherboard. I can't put the whole computercase in it, as it takes too much space.