20' center console and 90hp evinrude. What will cruising speed be?

[Bushwacker]

Fr. Frank,

Thanks for providing additional details/date on the participants in the government's "Biscayne Bay Shootout"! Steve D's article indicated there were only 2 other participants, but there were so many competitors on Miami's "Thunderboat Row" back in those days, I figured there were probably more than two! Do you know what I/O setup they used? I heard they used a big block Ford? Denny