You could do some fab work to make it fit, but it would likely change the dynamics of how the trailer towed, especially regarding the tongue weight. You would have to move the bow stop backwards a fair bit, fabricating a custom mount for it. That would lessen the tongue weight considerably, and to compensate, you would need to move the axles back. Or you could move the boat forward to the to the bow stop. You would have to shorten the trailer at the back a couple of feet, which would involve moving the cross supports for the bunks and shortening both sides of the frame, taking into account that the cross supports also act as frame crossmembers. Again you may have to move the axles, to correct the tongue weight. How are the brakes and wiring? Having to redo them would be an additional expense. With a properly fitted trailer, your boat would be much safer to tow. Another thing to consider is that any modifications you make will affect the carrying capacity of your trailer, and may involve an inspection, or you may find your insurance invalid should you be involved in an accident.
Weigh this against the cost of a new trailer (dual axle, surge disc brakes etc.).
