[willy]

If you were to fill in that hole for the outdrive and put a single engine
Armstrong bracket on it and install a 115 Johnson you would have
Old School.
That was my first V20, a 1986. Great boat. Do a search for Willy's Old School and you will see it.
Check the transom better than with your fist there Rocky! LOL
Pull a screw or two from the transom and check what comes out with it. Try to pull the screw from around the outdrive hole area if you can, do it on a hot day and leave it out for a few minutes while you inspect the rest of the boat. I walked away from three different V20's after I did this and walked back after fifteen minutes or so and saw
French Onion Soup seeping out.
Check the stringers real good in the last two to three feet from the transom.
Use a flashlight and find the drain holes in the stringers that Wellcraft used to let water drain through the stringers to get to the bildge pump.
Stick you finger in the holes and use your finger nail and see if it is hard inside there. Use a awl or skinny head screw driver and press hard on those stringers.
Check inside and out as best you can for rot on the bulk head that is the rear wall of the cuddy, where it meets the cockpit. Look for cracking and settling along the floor and at the bottom of the corners of the cuddy door.
Check the area around the helm seat floor for flex.
Stand on the cuddy roof and see how much flex you have in that and then go inside the cuddy with a flashlight and look for staining from water on the headliner and material in there.
Stick your nose deep inside the inspection ports and pull all covers around the cockpit floor and if you smell the slightest hint of gas count on a replacement before you can even use the boat.
Accidentally lean on an open cuddy door and see if the screws holding it in are snug and solid.
Bounce up and down on the gas tank cover, cockpit floor area and see how much flex is there.
Eyeball as much of the fuel tank as you can with a good light, look for whitish pitting or dark moldy looking spots. Scrape them with your screw driver and see if you get a lot of stuff scraping off. If you do the tank will need replacing once that boat gets loaded with fuel and bounced around in the ocean and starts seeping through tiny pin holes into the surrounding foam.
I forgot to ask you if there was fuel in the tank to begin with. If there is none there may be a reason for that.
Get inside the inspection ports and open and close the through hull valves a few times and check the bedding for those through hulls.
Thats all I got right now, it is cocktail time.