Hi Shannon: Sorry for the delayed response, Don't get out on Hydrodyners.com that often but check periodically. My Hydrodyne is a 20 foot inboard/outboard which are a white elephant. In the community here, my boat is #2 behind the proto-type and there are two others beyond, the last being hull #7 that I am aware of. When you indicated that you had a 19 foot Hydrodyne, it raised a flag.
Is your boat still for sale? the Imperial upholstery is a bit much but I kinda like it for the period that it was produced.
No, my 1985 Hydrodyne 20 is an I/O. It is 2 feet longer and a bit wider than a Hydrodyne 18, and has a bit more draft, giving the the engine cowl a lower profile. As I indicated in earlier posts, the Hydrodyne 20 in an I/O configuration really does not exist (maybe 7 boats ever built in this configuration). This was the prototype HD 20 (as in boat #1, I have boat #2).