Hi, Just read your post about the boat.
I got Baja with twin 350 mag mpi with bravo 1 also.
I think you should try Bravo 1 props. maybe 22 pitch. I think that may help.
I am running bravo 1s 24 pitch. Also 4200 rpm, I put smaller props on 19 mirages, it put the revs up but went slower I also tried 25 mirages, that put the speed up but also 5000 rpm and better to run less revs=less fuel.
I have pairs of 19 mirages, 23 Lazer 2, Bravo 1 24.spare if you would like to test??
Let me know.