Hello, its been awhile!
Managed to put that original block back together and have been on water few times with it.
Its got more degrees on every port than other blocks so its little lazy under 4500rpm but after that it pulls quite good all the way to 8000. On the video its little leaner than now when on the water so that it makes good washmarks and also ign timing is lower now.
When on plane and over 4500thou it takes speed, both 1&2 person load, to max quicker than before or so it feels😁. Today with 2, 57kn and 7800rpm srx on it.

Its got ovalport head cut to 0.463, 1.5in carbs with 1.8mm &#3 1.9mm mains and floatvalves enlargened to 1.8mm with 5.5psi fuel pressure. Cr is ~7to1 and compreliefholes open.
Port * ex184, tr123, bst126 and bd 30*. Tuner is sst60 length. Boyesen reeds w/o stops and stuffing. And offcourse really loose pistons😂.

Here is short clip from tuning on a trailer: https://youtu.be/qVexDrSZiYo

-J-