well i know they arent all that different of a platform, but a '99 z28 will be a stiffer setup and also has wider rims/tires, so how can it not handle better? plus arent the 4th gens alittle wider, so that would probly add to stability? and then when you figure in the aftermarket, i’d take a 4th gen over a 3rd gen in a second. ive driven a few 3rd gen (though not on a track) and i never though it felt better than any 4th gen ive driven (maybe its because they were only SS’s and WS6s, i dunno)