[JoeC]

From looking at pictures......
The dark car with the ribbon paint ran in both A/MP and B/MP.
The dark car and the white car both had Baldwin Chevy sponsorship which would have had to be changed sometime in 73. The white car was 71-72 NHRA record holder.
The yellow car appears to be the same car as the white car. There are pictures of it with the same hood and roll bar. It had centerline wheels which were in use later then the five spoke 71-72 wheels. The yellow car ran in B/MP and in C/G with just Motion as sponsor.