There is a jamma adapter for Centipede. I think two bit com sells it. You can google it for "centipede jamma adapter"
You can make one, but you have to build an outside amplifier circuit.
The monitor orientation is vertical. I don't know what alleymaster is, my guess it's a bowling game.
Then you need of course the working board. Those boards are pretty sturdy. You can pick one up off ebay or rgvac from $50 - $125.