Interesting combo and it looks like you've been doing your research and made some good choices. I probably would not have gone MW ports for a boat engine but you have them and they aren't hurting you too bad at your size. I suppose if I was going MW port size I would've gone ahead and put a 4.25 stroke in it just to pick up some more inches but once again, you have what you have so now you just need to focus on the tuning.

Dwayne can get you the cam you need. The Lunati would probably work okay but if it was my money I'd just have Dwayne spec a custom roller. Only thing I see that I'd change if it was mine would be to drop the alternator down using a low mount kit just to give you a little more room at the top of the engine. With the mechanical fuel pump out of the way the alternator can drop down.