Great information, I appreciate you taking the time to do the math on this. I'm surprised to see the 100 hp nos actually worked out in the charts to be 103! I wish I'd thought of the WFO pictures, that would be worth a lot as far as the setup goes. The seasons over here, the colder than normal temperatures this month had everyone draining blocks early. As far as the engine goes it came with the boat. Compression..don't know yet, it does have forged pistons, and the big oval ports. I pulled it and put on a Bassett/Dooley pan, tray and good pump in it along with a scrubbin some gaskets and paint. I hadn't planned on using this engine past the baseline tests but now I may run it until next fall . It keeps up with the traffic around here for now. If it gets quiet around here for more than a day in the next few months I'll tear into it to see what it is.