Any 4 door sleepers?

Fremont Raceway had several brackets back in the '70's, but I don't remember the "class" cutoffs. Ran mostly low 13's with a best of 12.72 @ 108 MPH. Cruised South Main St. in Salinas on the weekends.
Maybe cause I’m young and naive but a 273 in the 12s is very impressive to me, what’d you do to get into the 12s? Was it a commando 273?