Your crossover should have a straight sport trac. It's not angled on the cross overs so the angled bracket quick release type won't work. Also they are only good up to a 24" boom. Lund does offer a downrigger mount for your boat that slips in the sport trac rail on the inside, straddles the gunwale and screws into the protrak on the side of the boat where the snaps are screwed into.
Also as another option you can always check out Berts tackle set up i googled a pic of it. This guys set up is crazy but you can get a slider that is 6" and the downrigger mount only. kingsmalleyes post shows a good pic of it. The Fishinhole, and cabelas sell it.
http://www.walleyecentral.com/forums....php?p=1752969