Here's a link to the GM Heritage Center sales brochure for a 69 Chevelle:
https://www.gmheritagecenter.com/doc...t-Chevelle.pdf
on the second to last page is a shot of the interior with the Muncie shifter, although the Muncie is hard to see. Someone may have a higher rez photo. The shape of the shifter is correct for a Muncie.