$1200 for a 2002 200hp Opti and bracket is a steal! The motor alone is worth about $4k. 2002 also will work with the current Smartcraft gauges. It should push your boat at a good 22 to 25 knots and burn about 10gph doing it. Closing the hole is not hard providing you have a solid transom to begin with. Remove all the i/o parts, sand the hole with 50 grit very well, grind the outer area of the hole inside and out to about 6 inches from the edge of the hole (should be able to lay two layers of 1708 in this area and not come out past the gelcoated area), cut plywood filler peices, cover filler peices with resin (do not use resin with wax), mix resin and high density filler (West System) into a putty, insert filler peices one at a time packing them with filler putty, use stainless screws to secure one filler peice to the next, after all peices are in smooth putty around edges and let cure, grind area smooth and cover with two layers of 1708, let cure, grind and sand smooth, fill with 3M yellow filler (underwater stuff), sand smooth and refill if needed, spray area with gelcoat and finish off. Make sure you spray enough so you don't sand back through it. You may even want to spray the entire transom if it's faded. Sounds like a lot of work but it's not too bad. We did a 23 Seacraft earlier this year.
If your boat is solid and you plan on keeping it,all this work will be worth it.
The boat will tend to turn a little sharper because the engine is set back from the boat. This moves the pivot point back. You will also need to mount the bracket and engine higher to allow for the water coming out from under the boat. Figure about 2 inches higher for each 12 inches back.
Keep us posted.