Hi Ed, we’ve been rigging this setup lately with 19″ Saltwater II, motor on 3rd hole and NO jack plate. Zero tendency to porpoise, phenomenal hole shot and 6000RPM/ upper 50’s top end.

Back to porpoise issue- our demo boat is rigged with 2 Talons, sandwich brackets and hardware, meaning lots of weight on the back. Still zero driving issues.

I’m not anti-jack plate, but if it’s intended for speed I don’t think this boat needs it. Is the jack plate used for rough water situations (adjusting engine height on the fly)? Instead of the jack plate, I urge you to consider trim tabs. They change the way this boat drives in rough water and much more adjustability than a hydraulic plate. They’re easy to learn and just might solve all of your problems in one fell swoop!