Thanks for the pics, they bring back memories! If this is Joe Hauser's Sprite it must be 70s, he switched to the Datsun by 1980 I'm sure, in fact mid 1970s IIRC. I think he ran 47 on the Datsun but don't remember what # or #s he ran on his Sprite. Is this maybe Joe Jr?
(Not arguing, just discussing old times!)