It's a 180, so the mounts might have to be altered and the heatsink probably won't fit at all. Mr.BigShot has a huge thread about his Orion motor, you could look for that to find some answers.
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Mazda Savanna RX-7
stage 2 motor | spaced wheels
The heat sink won't fit without some modding, but the stock motor mounts with the plastic motor cage will fit. The connector that comes stock with the motor is different from the RS ones. I just detached one from a S2 motor and replaced the Team Orion one. You also have to reverse the polarity of the motor wires. The good news is that it has neutral timing.
Well, I have a video now. Real close quarters, not enough space to get it to top speed. Problem is, I've no place to host the video. It's about 3.5 to 4MB.