I plugged the numbers into my hp calculator program and your looking at about 350 to 360 horsepower with around 400 to 410 ft lbs of torque. Assumming the weight of the Fairlane at around 3500 lbs that will put you down the track at around a 12.7 @ 108. If your car weighs more obviously it will go slower. I think that with that big C6 you'll be running very low 13's consistantly. I would suggest running regular Felpro head gaskets. Your not talking about an 800 horsepower engine in which you would need to get every last bit of power out of the engine by concerning yourself with that last ounce of compression. I'm sure that you want this engine to be reliable as well a fast so stick with the good Felpro's. I'm sure you don't want to be changing head gaskets in that tight Fairlane engine compartment. Good luck.