Dave - Rancho Marine Recyclers in Rancho Cordova has a set (or sets) of brand new pinned heads (update kit) for a either a 150 or 175 . . . I'll see if they still have the kits this weekend. Also I have the FICHT 1.42B software for connecting to the computers. Let me know if you want it . . . you can make a small donation to the site . . . and I'll put it in the mail. It runs on DOS 6.22 and you need a serial port on your laptop to run it.
www.DFItechnologies.com is the best source of info for the ficht motors.
The thing that craps out the most with these motors is the computer!! It's an aluminum finned air cooled computer that relys on an enormous plastic shroud and a flywheel fan for cooling. In 2000 fichts moved to the water cooled computers after Bombardier got involved.
I replaced this motor with a 1981 Merc!! and I don't regret it for a second.