Re: ingnition module/ camshaft auto vs. marine
You can swap the automotive module with the marine one without a difference. It just triggers spark so their isn't any difference as far as performance. Just make sure the pinouts are the same.
The cam shaft you will have to get one with the same lift/duration on it. If you don't, you will throw off your powerband, fuel economy, and mix up the computer's ability to try and "tune" your engine.