In the early 90's before the new 30" Mickey's came out, we were running 1960's Firestones beyond 400 & even scuffing into the cords on some runs without failure.
A real LSR tire doesn't have a whole lot of rubber on it so there's nothing to take off. A treaded tire on the other hand, it's better to buff them down to lose the mass & also true the tire at the same time. Age is definitly going to be an issue with this type of tire.
Sid.