I have a whole website about the race car AMXs, especially the Hurst built 1969 Super Stock AMX, Check here and click on the "visit" link at the bottom:
www.superstockamx.com
The S & K car is car #19 on page 5, John D'Andreas non Hurst car is on page 6. I have been researching these cars for 30 years and would love to correspond with anyone with more info.
thanks