I have 205's on my '72-91 Blazer/4x4 15"x6" wheels up front and they seem to fit fine, tire shop didn't say anything about it when I had them put on. They are Cooper Trendsetters that I believe have been discontinued.
I run mine at 70 on the highway for as long as traffic allows until I get where I'm going, and have no noticeable vibration issues. 216/T5/3.90, disc/drum, 3" dropped solid axle up front, stock leaf springs. It feels like an old truck on bumps, but doesn't vibrate, bump steer, or wander.
