I run a 28" M/T Sportsman bias ply on the front of my E body. The 165R15 radials I used to run drove better, but were too short. The bias up front and radial out back drives OK, but it's definitely better w/ radials all around. It is not a problem on the track at all...I only notice it when on the highway. The bias fronts tend to wander a little.

The 205-75 tires some recommended will look a LOT wider than what you have now. I know they look way too wide for me...I like em skinny up front.

The tallest radial skinny tire is only 26" tall...unless they have one out now that I'm not aware of. If someone made a 28" tall and skinny radial, I'd own a pair of them.