If your mounts are good on the Ford you will need to extend the alum. pad that they sit on inside the boat (aluminum engine bed)
The comp. you found is the MDC that converts the analog engine data into digital data feeding the dash gauges, next to that should be a fuse block. This will work with a non EFI, non ECM engine, this system was popular from 1997-2001-2-3? as a bridge before full ECM controlled systems took over (throttle by wire etc.)
The good news is that I should have the diagrams for that boat since I drew them, the bad news is that they are in my old computer which I maintain that old drafting software on (non-compatable with my current Win 7 comp) 3 months ago I could just print from the old computer and scan & send on to you, but my printer crashed a couple months ago and the old computer will not talk to the new printer, and I have tried a lot of settings to figure it out to no avail so far. If we have any tech guys who think they can help, I'm all ears.