TOPIC: 1963 johnson 40horsepower out board electro mgntic

I own a 1963 arkansas traveler with a 1963 johnson 40 hp outboard motor with the electro magnetic shifting. it runs pritty good, i've had it out on the lake a couple of times and it seems like all the major bugs are gone from when i first got it. i am unfortunately contemplating on selling it and i am attemping to put an estimated value on it. i am currently doing some fibreglass repair work to the hull of the boat and am going to repaint the boat. ive redone the seats in the boat and they look pritty good. i also have a question on how to hook up a tacometer? if anyone can help me out with any information on Arkansas Traveler boats, specificaly the Arkansas Traveler Comet, which i have, and about the johnson outboard motor and possible give me any kind of a price range that you may think my boat may be worth. thanks. chris.