I have a 67 Formula Tbird told was a ford motor but not sure what one, 350? 351? and maybe a copy of a wiring diagram with key, for some reason they unwired the dash...
Ford has the distributor at the front, chev is at the rear. 351 is ford, 350 is chev. Dont hold much hope of a wiring diagram for your 40 year old boat, I think you will need to rewire the whole thing, do a search for boat wiring guide on the net. Good luck.