[Nedsel]

Mike:
Sorry, I haven't been on-line in a while. (Was busy preparing 2 Cobras for "Cobra Day" at the Petersen Museum in L.A. We had 118 real A.C. / Shelby Cobras at the event! It was sensory overload.) Anyway, to answer your question, yes, there were some minor differences in the trunk/ tank configuration between the early FIA cars and the later USRRC cars. (At least, some old photos I have show different details.) I figured the car in the picture was a USRRC version, based on the photos you posted. And, if Vic Franklin suggests this is the car that Dodge Olmstead bought, then my guess is correct, as Dodge actually bought 2558, not 2557. (Have Vic double-check this.)