thanks all for the suggestions, images and comments...
I will re-read the posts... but here are a few notes.
I have "surveyed" the trees as best I could and at about 5' off the ground level the largest trees are 22 inches... so my initial 24" was for the butt end +/-.
Comments that the B3030 is a smaller tractor are obviously correct, I go to the dealer and look at some of the bigger machines and they do have more weight and steel than what I have, but I am fortunate to have what I have and so am attempting to not trash the machine.... that's why I posted.
The specs say the 3ph will lift 2139 pounds at the lift point and 1300 pounds 24 inches behind the lift point... so these logs at 16 ft. would be very close to maxing out the lift arms with the box blade option... there is better geometry with the log closer to the lift arm pivot points. I have an "old farm" with virtually no buildings left, just old foundations and 15 acres of field and 70 of woods. The pine will be cut to build a shop-barn of a modest size....mostly for sheathing... so YES I can cut the logs shorter... and likely it will be a necessity with my machine... maybe go to a 9 - 11ft log if it is needed.
I guess I am a bit concerned about chaining directly to the 3ph, with the likely shifting of the log pressure. Am I being penny wise and pound foolish with wear and tear on the hydraulics... hauling logs... or are these rear hydraulics VERY strong... seals etc. I am new to tractors with only about 100 hours in the seat since I bought the used tractor, and that was mostly bush hogging....
I hear you all when you say take it slow and you will know in the first 2-3 ft of hauling. Within limits it is reasonably powerful tractor, but beyond limits things happen fast. I will keep my hand on the pto lever for sure.
I will try to haul when the ground is frozen.