Nicely done. And the AF ratio didn't seem insane either (no lean is mean huh! )
Stuff like this and Shifter's LSX power really makes you wonder how long our dinosaur BBCs are going to be around... Especially in small to mid-sized Bravo boats where the percentage weight differential is material.
Those are the headers that will be on the engine in the boat. I try to run the complete package including fuel system that will be in the boat when I dyno.
I have built some smallblocks for a race boat before that turned 7000-7200 with bravo drives and had no problem. With the RPM's up it takes a big load off the drive. Plus getting the prop speed up it seems to make the boat handle better also.