i own a kyosho alpha 1 it has a gx12 stock engine w/gold short head, the one that comes with the car and i would like to know witch os engine will fit it. it has a weird 3-bolt pattern that bolts into the chassis to hold the engine.

There isn't an O.S. engine to fit your car. You'll have to make some mounts and then drill the chassis to accept those mounts. The Kyosho engine was intended to be bolted directly to the chassis without using mounts.

The Kyosho Alpha One was discontinued long enough ago that many parts specific to it are no longer available.

thats true thanks!