"I wonder if the Allard aficianados might weigh in on several of them: the car shown as "Steele" in a Lincoln-Allard at Pebble in '53 is a mystery. That car has Harry Steele's number as listed in the program, but the program lists it as a J2X whereas it is clearly a J2 and appears in fact to be the Chapman Cad-Allard--a car seen in this picture. 

The identifying marks of the Chapman car (later driven and then owned by Tom Bamford) are the hood airscoop, three eared knockoffs and white paint.  Steele normally drove a Cad powered J2 which I think was red -- it can be seen in photos of Pebble 52, esp.  a famous one showing him being lapped by Bill Pollack. Tim Bamford might know the answer to this one."