"trying" to piece together my first jet boat. Starting with a 18ft. '75 Gemcraft Southwind. I bought the hull w/ interior only; the owner said it had a 454 that turned a 12JC Berkeley. I bought the same pump that came out of it(12JC), and have been trying for the longest time to fit this 455 in it. I have Harding water logs with up and over transom boom tubes. with the engine as far back as the exhaust will allow, I'm still short of the pump by a solid 3". WTF? I never imagined I could be off this far... With the engine and pump mocked up out of the boat, the rear motor mount will be sitting over the intake flange of the pump body by about 2", does that sound right? My idea of an easy solution would be a longer driveshaft, but i heard that doesn't exsist. My current shaft if 6.75"... Any input you may have can/will determin my boating experience this summer. Thanks