69 Chevelle SS 396 w/ 138 Vin #

I talk to a guy that own a 69 Chevelle SS 396 and he claimed that in 69 there were two Types of SS 396 built. He said GM built a true SS 396 that was built at the plant from beginning to the end and used the vin number 138. That a 136 was a Chevelle SS 396 was a converted from a select Malibu sport coupe at the plant. I have never seen a true 69 Chevelle SS 396 with 138 vin number. I told the guy that the 138 vin number was last used in 1968. He insist that there are rare and out there. Does anybody have any truth to this comment?