Originally Posted by STREETSLEEPER

Well the last one I did see they used headers and tune. But for LS1 techies that just a done deal. I have build a few of these cars and the engines dyno more than you think. The exhaust and the tune is all that is holding these motors back. These are the same engines in the Corvettes of the early 2000's that make 340-350 with just an exhaust change. But still if you are to buy one of these engines in a crate 400 flywheel HP is just a bolt on or two away. But my point being it's there for the taking without going inside of the motor. Now 400 to the rear wheels a whole different ball game. And that ball game goes as follows, a good cam, headers and y-pipe, and a good tune. And I have done it with as little as a 228 cam, headers and tune.