The #99 late model (late model being a relative term here ;-) as opposed to old modified) with "Ralph's Muffler Shops, Indianapolis, IN" on the rear fender & carrying the checkered flag at the Legion Bowl is Pat Kirkwood from Ft. Worth, TX. I got this Nashville Speedway brochure today that has a story about him being the favorite and it's the same number. Plus, if you look over the door you can see the "..at Ki..." behind the checkered flag.
I love solving mysteries! Russ Thompson.