Can end up being a very costly passtime, that, Steve.
I have a cold air induction set-up (Donaldson Blackwing), a Trans-go shift kit and a Magna-flow, but heavy engine mods a la Lingenfelter, Mallet and Callaway are downright scary.
The car in the vid belongs to a guy who contributes to a US forum that I post on. My guess is that his motor package is $30,000 worth. There's a FL Corvette Club gathering in Orlando this weekend. There will be more than a handfull of $100K + C5's at that gathering.
many argue that spending big on a Corvette is pointless and that the money would be better spent on a Porker or a Benzo, but for gut-wrenching torque, super-strong 100mph+ acceleration and a beautiful noise, they can't be beat - though I feel I'm preaching to the converted in your case!