You don't give the GTO much credit. Very nice interior, decent straightline speed (350hp, 3700lb curb weight), IRS, somewhat bland looking. The engine responds well to mods, head/cam packages run 3-5K and can get 410rwhp-460rwhp. I'm not sure why you think it can't handle though, the weight will be an issue obviously, but that chassis is fairly good at handling.