Hoping someone remembers this car

[SS427]

I just inspected this 1970 LS6, M22, 4.10 (now 4.88) Chevelle last week for the second owner, Mike C who has owned the car since 1978. The car has all its original drivetrain, interior, glass, and paint but was modified to race. I am currently trying to locate more photos of the car when it was raced at Byron and Great Lakes Dragaway as well as other upper midwest tracks before it was put on the street in the late 70's and was hoping others on here may have more photos or information of the car from its racing days. It was also displayed at the 1981 Car Craft Nationals. Mike told me there was writing on the doors "Big John" and front fenders when he acquired it but was unable to come up with photos of it when it was raced that way. Mike's father bought the car for him for graduation in 1978 from the original owner John Keifer of Northlake, IL. The car has not run since 1982 and work will hopefully begin soon to bring it back to its racing days. Mike is the second owner and the car is well documented but I was hoping I could find more photos for Mike to add to the car's history. Thanks in advance for anyone's help.