The Stapp 11 that Dr Foyt drove is I believe in the IMS museum, a purchase of the Foyt auction back in the 90's (I went, a neat deal. AJ was super that day).

The story I got was that Snider owned the chassis, and Foyt the engine.

AJ drove that car more than once, by the way. IIRC he drove that car later in 1974 as well.