I would love to find a nice Shadow. I saw one on 280 last year.
I had a 96 Javelin 379 with a 150 Johnson on it, and I didn't get passed by any other boats running 150's, but I spent a lot of time getting it dialed in and propped right. I blew the powerhead and bought a 91 block and had Paul Nichols do the short block for me, had Monty Racing weld up the hole in the exhaust tuner and had a set of baker hot heads on it, with Ficht reed cages and boyesen reeds. Running the magnum OMC gear case, it would run 68.5 with just me and all my junk in it, with a stock 24p Raker 2 prop. I think if I would have had the narrower stock gear case it was an easy 70mph boat. But those stock cases just didn't last like the magnum ones did.
I would love to find an older Basscat Pantera, and stick a newer 200 SHO on it, and have it flashed and see what I could get out of it. There is a guy with a flashed 200 Sho on an xpress x-19 thats running upper 80's. That might be a fun option too.