Okay, I found the vin to the car. I won’t list the complete vin because by now it might be someone’s project or complete car
You can take the first three numbers of the last six numbers of the vin and they’ll tell you the approximate month and week the car was built. I don’t have my books handy so one of you first gen Camaro guys help out . Those numbers are 208

The actual 67 Pacecar was a L78 with a 4P.

I looked in my old books to figure a build date of the 4P convertible I’m talking about but was only able to come up with a month based on the 208 numbers of the vin. It’s the month of April or 04. I’m using an old Camaro Corall mag dated 1991.
I’ll keep searching and maybe can figure out a week in April it was made.
Later,

Chevy switched over to 4K in April but forget when.

I know of about 10 4P L78 cars.

Richard, does the white car have it's original block? Can you send me the rest of the VIN? I know of two 7N208xxx blocks.....