I know it has been a month since you posted this, but I saw that it didn't have an answer. Chrysler had a few boats, and here is a site that has about as much information as I have been able to find on Chrysler boats :
http://www.hurrikain.com/Chryslercrew-new.htm
My guess is that it is a 1974 Chrysler Conqueror. I also have a '74 Conqueror. It is 16 foot and has a 105 horsepower chrysler outboard on it. The boat is awesome, and I get comments and compliments anytime I go out on it. They were definitely ahead of their time.
I have not had any problems with mine, and I know that you can still get most of the parts. Check out that site, there should be a few links to parts as well. There is also a Yahoo group called "Chrysler Crew" which is an EXTREMELY helpful group of guys (some of them worked for Chrysler and on these boats) that can help steer you in the right direction.
Chrysler also made a 'big brother' to that 16' Conqueror also known as the Conqueror S-III. It was 18'6" and had a Chrysler inboard V8 in it. I just picked up one that I will hopefully restore that has a 340ci in it.
Hope this helps!