Kewl Go Kart barn find what's it worth

It has a top end sprocket so I havent been able to top it out yet before the street ends....holy crow......I been looking on the vintage racing cart sites...Wow they are into these things like were into a bodies....It sure looks kewl in the back of the waggin!!!
When is my turn.Man that brings back old times my guess as to price 1000 bucks or more.Hey lets see you do a burn out with it.It will do it mine always did.Mine was not that sweet but it had a Briggs & Stratton 5 horse.