Re powering.......again hows a 200hp on v20 do?

[gotomgo]

ok 5th engine and 4 time repowering this season(crappy craigslist engines with secret problems etc..)everybody was right about the 125 merc saltwater being too small. it does work but i have to push it too hard etc.... so have benn mainly going very slow its reliable etc etc...my plan was to re power next year with a bigger engine. its a 78 center console had a 150 black max on it .i came across agreat deal on a 200hp merc for it.its guarenteed etc...i couldnt pass it up.has a nice 4 blade stain less prop on it(dont know size currently)im super excited to see what this boat will do with a 200hp on it.i have the old prop off the 150 plus my buddy has a bunch of stainless racing props cleavers etc from his older daysi understand the right prop is everything but with the right prop how fast do you think she will go?i know the fuel bill will be ridiuclous