While you can make them handle much better, it'll never be anywhere near an autoX car (even though a few people here do that) Just to big and heavy.

Also, if/when you go with exhaust mods, don't expect to hear that nice V8 sound. They get rather raspy. Best they will sound is with a big cam (or a decent vacuum leak) and some Borla mufflers.

(I've got a 95 Caprice LT1 with LT4 top end, headers, exhaust, intake stuff, lots of fun for 3 tons)