I have a 1996 Formula 419 sr1 with triple 502 mag mpi. (not a stepped hull) I run 25 pitch 3 blade mirage props for a top speed of 75 mph at 5200 rpm. I am putting in 3 prochargers M1sc with 5% boost and coolers. My question is what speed can i expect out of this set up and which is the best possible prop and pitch for top end performance.
An advice would be helpfull. Thank you.

I would take a guess that some 28" Bravo 1's would be a good starting point.