The Vortex is for the older SeaCrafts that drain the water 90 degree down through the bottom of the deck. It would never work for through the side or our the stern of boats.
If you want to drain water through the port and starboard sides of the boat you will have some problems. First off SeaCrafts have in inner liner and then the hull. There is not enough room between the two to make anything water tight. You would have to remove the inner liner to secure a flap type scupper facing to the stern for a side mount scupper. Then there is the problem of the inner liner allowing water to seep down into the bilge.
I do not like side scuppers on SeaCrafts. I would go out the stern through the transom like most traditional scuppers now a days. I like the flap type as are on my boat currently. It requires some work and of course $$ but if you are like me what ever I spend on the boat is money well spent.
FellowShip
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Just for the Grins
Official 23 SF Antique Classic SeaCraft Owner