Not be a buzzkill here... BUT!!
http://nh.craigslist.org/boa/2521116656.html
I just randomly typed in v6 in the search box! I have rebuilt more than a few motors and my advice would be something like the above.... keep one boat or strip one for the parts you need for the other. For $1500 you get a running motor, spare outdrive, spare everything! How can you beat that??? Hell use this boat this year....
Rebuilding a motor is fairly straightforward if your meticulous and know what your doing. You could spend alot of $$$ on your rebuild, but if you screw up one little thing... you could trash the whole motor and essentially throw your money away.... There is a reason mechanics rarely rebuild motors in thier shops anymore.... the headache and potential hassles are not worth it.
With the motor out of the boat already and everything disconnected you might have an issue figuring out where all the wires & hoses connect. Also, dont forget you have to align the motor using an alignment tool before you put the outdrive back on. otherwise you will chew up your gimble bearing in about an hour of run time.
Woodsy
PS: If the boats been unused for 9 years you can bet the all the hoses and the waterpump in the outdrive need replacing!