For you guys that have never seen a 296 heres a pic,this pic running around 71 ish at 5500,with no plate straight to the transom,with a 27 tempest on a 200 opti,I think a 25 would be a better prop,but keeping the rs below the 5750 on the opti is tough.
And with a 200 proxs you should see 2 mph .
Stick a 8 inch plate and you will be at 75 easy.
Also this test is with 2 guys and a full tank of gas.