Well, it's good to meet good people. I'm one who will second that motion.
Welcome to the Forum!

Why do you want to pay high prices to have that gem worked on, when you have just joined iBoats Forum and met good guys. If you're any kind of a mechanic, you'll do fine with that ol' 18 of yours. You'll sh*t your drawers when you find out how fun and simple they are to work on.
First off, with this, just clamp a 2x4 in a good strong vise and hang the motor on it. WOW!! no crawling under the darned thing. Please do make sure that your vice is mounted good and strong though. There's nothing that can **** you off more, than to have your motor come crashing down. Never happened to me yet....thank God, but be careful.
Buy the manual and study this beast. Get to know it and read up on the maintenence of it. They're a lot simpler than they appear and far easier on your back (and wallet) than cars. You did get a nice classic, by the way.
Those old 18's are probably in the top 2 of the best motors, built by Johny/Rude.
And yes, you are right. There's a lot of good guys here and some are antique outboard enthusiasts, too. If they ever tell you that you have a "disease" when it comes to collecting old outboards, don't let it **** you off. They'll often post pics of THEIR own restored classics when they talk sh*t to you like this. These guys have some nice antique classics too.
Have fun and welcome to iBoats Forum!!
Leon