I don't really "NEED" a 522, but since it's been off the road for 30 years, I don't want to be disappointed with "just" 420 HP +/-. Don't want to tear the convertible in half though.

Is 500 HP in an E-body convertible overkill for street cruising and flooring it occasionally, or is it too much?

Car came stock with 440, 4-speed and Dana rear (3.54 ratio)

Thanks