The BF Goodrich Radial T/A is an excellent high performance tire. I have them on both of my '64 Avantis and am very pleased with them (and I am a big fan of handling). One car has the stock anti-roll bars, the other has the much larger anti-roll bars. As one would expect the car with large bars makes better use of the handling potential of the tires. Both cars benefit greatly from the BFG tires, though.
Many muscle cars of the 1960s used 15" tires, and it appears that half of the restored ones I see or read about have BFG Radial T/A tires on them. So, there is still a sizeable market for 15" BFG Radial T/A tires.
--Dwight