Update. Hit 64.6 with a tail wind and 62.5 with a massive headwind last weekend. Full weight, ran into some chine walk. I'm going to bump the motor up a bit on the jackplate and see if that pushes the chine walk out further and if I can get solidly into the 65-70 range. At this point if I pulled some gear it would run faster.
Running a 25 pitch 4 blade prop. RPM was 5400-5500rpm. WP 20psi per gauge. Motor has 580 hours on it. Hole shot is great.