69 L89 Chevelle, El Camino

[SS427]

Thanks to all so far. I am a 70 guy and am not real well versed on the 69's. However, this guy is getting beat up by all the neigh sayers and I am the sort of guy that says, it is real until I can prove its not. For that reason I chose to try and help him authenticate his car. The original engine and transmission are gone so all we have is the broadcast sheet.

I cannot use any buildsheet samples as the engine codes are just what one would expect and in this case, do not correspond with the broadcast sheet. However, on the broadcast sheet for this car box 11 (engine RPO) is a Y. Dale McIntosh is so far the only person who has come up with anything and in his books claims that the Y 'could' denote L89 but I need some other proof, hense someone else with a Kansas L89 with the Y code in box 11. In addition, the code for the tune up decal is CP and not the normal CH. I am finding very little information on 669 cars so after many hours of research I am still coming up empty handed.