80 hp 25 knots WOT, cruise 14-16 knots. I didn't use trim tabs, but weight is always an issue, so it might help.
My 2 cents- from my 20' Eastporter rebuild
Lifting rails helped a tremendous amount with stability and keel direction at speed. Place 2" below...
1982 25ft bhm
Looks like a clean boat for a new diesel.
ROS cut the huge keel down to 4" for use with the outboards.
I had to search on Youtube "Boat Build Episode #" by a guy having ROS build him a 30' with twin outboards. I got as far as
episode 20- maybe that...
I just went down a rabbit hole watching the ROS boats video series. Very detailed on hull lay up and Bill seems like a really humble guy.
Looks mint for the year
1984 Sisu 26 ft
42' South shore
1991 flye point 32