Hotrod -
I believe there are "L" brackets available for mounting jetdrive outboards 5 inches higher on the transom. I spoke to these guys, and they seemed very knowledgeable on the subject:
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http://www.jetdoctor.net/index.php
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To me - a jet drive on a Triumph hull would be the ultimate combination - assuming that the hull design was compatible . I am not sure exactly what issues are involved. I have a 190 Bay, and the jetdoctor gentleman and I spoke for a long time about whether or not a jet drive would work on my hull. The 14 degree "V" on mine might split the water and push it away from the jet intake, whereas I guess you want the water to be directed toward the intake. I have read that a 12 degree or less is most desirable. I would love to see someone put a jetdrive on a Triumph. Good luck. -Andrew