[396L35]

My friend just recently bought a 1970 LS6 Chevelle and after he brought it home I noticed a sticker on the windshield that I have never seen before. I questioned him about it and he was stumped as well, so I am turning to ask the Chevelle guru's out there in the Chevy world. It is about 1/2 inch tall by 1 1/2 inch long and reads "SP". This car was delivered to the Chevy Eng. Center, Warren Mich. GM Proving Grounds according to the original build sheet, it also has a ton of options including power windows, and fiber optics. Any info on the sticker or if anybody knows anything about this car would be appreciated. [img]/ubbthreads/images/graemlins/confused.gif[/img]