F W & associates made them, in the 80's, they made alot of "replica" style karts which were usually promotional/sweepstakes or sold through dealers alongside real vehicles (made the kids bug the parents to get them into the showroom)
the Kart I had that was made by them had a tag with some info glassed into the underside of the body in the front, I cant remember if It was serial numbered and dated or not though.
if you search valvoline mini dragster you find some info, looks like they badged them different ways