TOPIC: buehler turbocraft jet 35

hey i just picked up a turbocraft a couple of weeks ago. been sitting in a carport 15-18 years. he didnt have a title. belonged to decessed stepson. so im shooting in the dark online trying to figure the year. wondering if anyone might know something? best ive seen its 61-63. all those jet 35's look like the same insides. my boat tag under back seat has a 18. guessing length. then the boat# is D0242. my jet drive is bueler mod.#2233 the ser.# is 258 8-1. i know its got the gray marine v8 - 188. (327).