The body of these kits aren't bad, it's the chassis that is lacking. If you want to make it better swap in the chassis from the AMT 69 Cutlass W-30 which, while still not quite up to modern standards, is leaps and bounds better than the Chevelle unit. Both of these kits can be had very cheap, with some careful shopping you'll probably only be in it for the cost of a kit fresh off the shelf.