Final update.
Had the boat out today and the Vessel View showed 58mph @ 5400rpm at WFO, water pressure at 14.9psi, temp holding at 120*F in 77* water, 81* air temp. Load was 2 fishermen, light tackle load, full livewells and 25 gallons of fuel. Hole shot is great, rpm starts at 3300 shooting up to 4000 at plane. All prop vent holes are plugged. Verified ptp is 4”. No jack plate.
I’m thinking this setup can’t be improved upon: 150 Optimax Pro SX, 23p Tempest+, 4” ptp, 2013 Stratos 189vlo
Many thanks to all who offered advice!