The 70 base Corvette was 14.9. The 70 LT1 was not the base. The LT1 for 70 in the Corvette was clocked at 14.1 and in the Camaro was 13.88. These times were both with the optional 4.10 gears. Either would have been difficult for a 340 Dart to come around, but not impossible.
If any of yall did it, either the driver didn't know how to drive, or it was not a real 70 LT1. I had a neighbor growing up who had a lot of thee cars and just because they were Chevys, they weren't slow. Yall can keep living in that fantasy land if you want, but there were badass cars that weren't Mopars.