Mine with a K&N CAI, Edelbrock 50 state legal shorties, true duals, and street tires went 13.1 @ 104.5... not bad IMO. Not to mention the tune was off because the tuner said he couldn't get the car to run on his tune.
I didn't say anything about horsepower. Y'all were talking about the torque of a 5.0 being beastly, when the torque of a LT1 is even better.
'92 C2500 6.5 Turbo Diesel | '96 240sx