For the interior dash plaque its not out of the realm of possibilities that the original dealer installed as part of the prep. If it was missing from the factory or damaged somehow they may have simply went to their stock and installed what was there. Not sure how you would look at this then. The car should have had a 69 version but eneded up being delivered to the OO with a 68 version.

Without being there yourself when the OO picked it up, you may never know for sure. memories get real fuzzy on this detail stuff after 50 years!

In that case if it could be somehow authenticated I would likely restore it how it SHOULD be not how it was. If I hear from other COPO owners that have the 68 then I will leave it. However, as so many of them have been previously restored that may not be the answer either.

Heard from another 69 SS396 owner and states the same as you Sam, 15/16".

I'll confirm what Sam has said about the wheel cylinders. I pulled these original cylinders from my '69 Chevelle, KK 4.10 axle and they are 15/16.

Maybe that 3/16" rear brake hose is somewhat standard too. I just have not laid hands on enough 69's to know.

I have seen them on "early" 69 chevelle SS cars like the black chevelle Ryan has described in an earlier post. Not sure about COPO's or Yenko's.

I just said, there are indeed others that were delivered this way. I recalls specifically asking the owner about it on the white sYc Chevelle and he didn't even know what I was talking about until I pointed it out, and said that it's the same spear the car always had as far as he ever knew. I have no reason to believe yours wasn't that way since day one as well. I absolutely would restore it the way it was delivered, including the 68 dash spear.

rear brakes
 

Rick
My June built Baltimore 69 SS vert had the 940 15/16 rear brake cylinders and the 3/16 inch rear brake line

thanks
 

Rick
I wanted to say thank you for taking the time to post all of this information. it has been extremely helpful!! I just got my car back and started the rebuild process. Your insight, pictures and processes have me rethinking and re-doing processes I have already completed. it is a true inspiration

Ha, Ryan try more like nearly a decade ago....Ryan has the Best Memory, LOL.

Rick, I would DEFINETELY use the original as found name plate in your Yenko Chevelle.
We have seen this and we have learned that it did happen.

https://www.yenko.net/forum/showthre...Black+Chevelle

Dan