"136" v. "138" Chevelle Vin #

[MosportGreen66]

I have a buddy with a 1969 Chevelle with a "136" vin number. He does not know if it was originally a super sport, either do I. Up until this morning, I thought all Chevelles with a "136" vin were Malibus and all Chevelles with a "138" vin were super sports. I have applied this "thought" to many chevelles over the years and now I fear I'm totally wrong.

If you remember back a couple years ago when I found the '70 Chevelle super sport build sheet in the back of the Camaro... Well, I was looking at that build sheet today and this '70 Chevelle L-34, M-21 super sport has a vin of "136."

Can some Chevelle expert lend a helping hand.

Thanks!
-Dan