I've been working on finding out some more history on my SS/DA hemi Challenger. I just found the entry list for the 1975 Winter Nationals and I believe the car was entered as #7506. The list shows Bob Thomson as the driver and the owners as Thomson and Welch from Costa Mesa Ca. The original owner of the car is James Welch of California.

http://www.classracer.com/classforum/showthread.php?p=104123