I would love to hear an explanation as to how putting a front tire (radial) that tracks straighter going to make a car more unstable because it has a bias ply on the back. I can see why a rear radial/front bias isn't a good match. But the conventional wisdom of never mix radials with bias never seems to come with any evidence or explanation.
I did this once before on one of my street cars.....Spun it 720 after hitting one of those rubber bridge gap things as the radials and bias tires do not react the same to side loads, and they made the car unstable at thruway speeds. This was back in 1988 on my 73 Cuda...
So I am leery of doing this on my prostreet car, but I think they will improve how it drives.