Make sure that the scupper holes you drill are 1"- 1 1/4" ID so they'll accept the expandable type plugs. With the drains in the bottom of the trough (and below the waterline) you may have to plug them in certain circumstances. As for the engine mounting bolts/nuts/washers, make sure you have enough room for the diameter of the washers.

I have a new to me 2003 215 osprey dual console. It have a Yamaha f225 on it i dont know  the prop size but curious what people get for speed and fuel burn. Also what prop size they run.
Currently I am having motor issues and can only do 5000rpm (bogs down after that). But I am doing 30mph at 4800rpm and roughly 26-27 at 4400-4500 rpm. This is with basically full tank.

What should I be seeing and what prop should I use?

I should have tried my heat gun first. That's a good idea. 

I have heard mek can spontaneously combust in direct sunlight so dont do the following. Took one final stab at the super tacky poly resin. I put a light coat of mek on the super tacky surface and put the boat in the sun for 45 min. It worked. Still tacky but like laminating resin should be.  This stuff throws curve balls every once in a while. It was a new bucket of poly so maybe I didn't agitate thoroughly enough or maybe a hex was put on me by an unknown and unseen witch? Who knows.

I can see the end.  Had a lam go south on me maybe. Still a few areas that haven't cured after 12 hours (see red) . Going to let it sit in direct sunlight today and see what happens. Like I didn't kick it hard enough. It was 96 degrees yesterday. Hard to believe. Perhaps a good grinding session to get my head realigned.