Al,
I think all of the records that the real Cobras set back in the sixties have all been broken a long time ago with the replicas. In fact a member in our club the DSCC lives down here in Fort Myers that won the Run N Gun some time ago his name is Gary Proia. His Everett Morrison Cobra with slicks all the way around is for sale. It has a 509 Chevy engine. If your interested I could put you in touch so you would have his Cobra all ready to beat those records. If it's already sold maybe someone has already picked up the challenge.
Dan