I don't have old muscle cars to draw comparisons to* but I prefer to think of my L99 as a factory freak! With only a tune and CAI, one false move and I'm eastbound in the northbound lane. I probably shouldn't have anything much faster. Unless of course you're giving them away.
*the closest thing I drove regularly was my mom's '67 Cougar 3-speed 289. Hardly a muscle car of the day, but she thought it was!