Welcome. Sorry for delayed response. Been very busy.
You should take some time with one of your favorite beverages and start reading posts here. You'll be amazed how much you find out and you'll soon become pretty much an expert.
Agree that there is a reason that marine specific parts are made other than just to charge you considerably more than an equivalent automotive part. They're designed to prevent your boat from going boom in case you get an engine compartment full of gas fumes. Ive heard the argument that you just run the blower longer before you start it. You can run the blower for an hour before you start it and it won't do you a bit of good if you spring a leak and start pouring gas into the bilge after its running. That's just an explosion waiting to happen.
Carbs, distributors, alternators, fuel pumps and starters are designed specifically for marine environments. Don't cheap out and use automotive parts in their place.