Was researching the Raybestos Blue plate Clutch kit when I stumbled upon this thread on a sister forum. I thought it could be of some use to us j-body owners. The thread is a bit dated, but seems to have some good info. Anyway, here ya go.
Here
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"The J's weren't designed to be sports cars, the suspension sucks, the brakes are tiny, and the target market for our car doesn't need to be able to do any more than 65mph." - Shifted
A more accurate observation has never been typed. These should be the starting points before any serious performance modification. What's the point of making a serious performer if you can't control it's power?