IIRC automobile titles were required around 1972 and and water craft followed a year or two later. It is likely that there is no HIN for the T34 you are interested in and a registration would be sufficient to transfer ownership (along with a bill of sale). You won't have the previous registration or a previous owner to sign a bill of sale either though.
I'd suggest you contact a marine salvage outfit as they should be familiar with the steps you need to take to gain 'ownership'.
"The cure for anything is salt water~ sweat, tears, or the sea." ~Isak Denesen
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