Been a while since I posted this topic. I figured I’d follow up to hopefully help out any other members of the site that might be curious about the same thing.
Since I wrote this I bought a 2013 Pro Drive X36 with a Gen 3 upgraded lower unit. I ran it once season on my 1860 husky john and it did good but not great. Before last season I had the heads decked, ported and polished and it made a signficant difference. I’m able to run about 25 mph empty and can plane out 3 guys and gear running in the 20’s all day. For me that’s about as good as you can ask for.