Hp or torque per litre is largely meaningless.
Total torque "under the curve" is what means more. A relatively flat torque curve is much more "drivable" than a peaky curve.
The Corvette is NOT overpriced for what one gets for the price. Anything else equivalent costs 2 to 3 times the price.
Corvettes are designed/engineered with RACING in mind FIRST. That is why their serviceability is so good. There is a reason why most Corvette owners have one for the rest of their life. Great value and performance for the $$$.
They don't rust either.

My lbs/hp in the Corvette is 6.3lb/hp using flywheel hp you use above (3100lb, 490hp) or 7.2lb/hp (3100 lbs, 430hp) at the rear wheels. Both are far higher than any Camaro SS or Mustang GT. From the factory I also have rear tires wide enough to put that power down to the pavement.
Corvette wins even "stock" always due to superior hp/lb.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !