Come on guys; yeah the L88 was a monster race engine, but bolted into a '68 Vette there's no way it'd go 170mph. The thing would become a kite at 130mph! The claimed horsepower of 550-600 is a little optimistic too. Look at the quarter mile time (we really need to know the speed but oh well). Even if you had to walk it off the line to preserve the tires and soft-foot it into second, if it had that much power it'd run mid twelves on street tires easily! With slicks it should run low elevens! I don't doubt that it's a wild ride but these power output and performance claims are another example of the muscle car fables out there. Here are a couple more: 427 Cobra 0-100-0 time of 10 seconds (not gonna happen); 11 second factory cars (427 Fairlane, Hemi mopars, etc. - they run 11's after the engine's been completely gone through, 500lb is chopped out of the chassis, and a full-drag suspension is bolted in). I'm not much of a GM fan (or an American car fan for that matter) but I'd wager a ton of cash that a current 405hp Z06 would blow the doors off of this car in all measures - even with both cars running current high-perf tires. But hey, it all makes for good bench racing!