j.b. weld or marine tex will not hold up,don't waste your time.there is to much flex on a t-top,s.s. toggles will be the easiest fix.the strongest fix would be get2 access covers from west marine or where ever and install 1 on each side in the floor.you will have to cut 2 holes in the floor.then you can use bolts with large washers under neath.before cutting into the floor make sure your gas tank is not underneath.