Be more specific
Alain - I'm guessing that the 350SS or 455SS relates to the engine size, and that both are 1/2 ton, two-wheel drive trucks, models that were more biased toward acceleration etc.than carrying capacity. It will haul the boat, but there is really a bit more to trailering than just making the thing move.For a 'one time' move, at reduced speeds, you can probably haul it OK if you've got good brakes & tires etc on the trailer ( it's illegal & plain stupid to haul anything that heavy without trailer brakes ) provided you're running over fairly level ground. A load-equalizing hitch is probably necessary to maintain steering & control of the thing at anything approaching highway speeds, especially with a 1/2 ton truck. For towing any distance, or often, the axles etc on the 1/2 ton aren't sturdy enough. Ditto for the tranny.You really didn't provide enough detail to get a good answer to your question, but I guess the short answer is 'Yes,it's possible BUT not very wise'