I had one mounted in my '93 Sailfish, and it worked out very well. I had a firend that installed the same model chair in his 232 Gulfstream. I installed a backup plate which I bought from the chair manufacturer (I'll try to find the name), and once installed, the chair was held to a top-place on deck, with 3 hex-head bolts, so it could be remover very easily.
I left the chair on the boat when Brian (gw204) bought it, and I think he removed it. You could pm him and ask if he still has it. I was a very nice chair, which could hold 2 rods in the arm-rest rod-holders, and had a gimbal for the marlin fight. So it could be used when trolling (center line), as well. I was even great to sit in when bottom fishing.