Same

Looks like round port heads to me, Nice car though!

Car has 12 bolt rear that's not original to the car. Waiting on TT picture which according to the owner, Jerry M confirmed as being original to this car.

On the bottom of the NCRS letter was hand written "Royal plum 67 SS L78"

Repaint maybe?

In the ad:
"It was originally a plum car,the second owner didn't like the color and painted it marlboro maroon when it was 3 years old,that is the paint that is on the car now"

Thanks Tom, that additional info was added after the original post. I like Plum better than Maroon, but still a Kool car either way.