Well, if you have a WB and Aeroforce, then you should be able to read damn near everything!

Like what was said--the truck will idle and run OKAY...but not to its ultimate potential with a good tune. A bigger cam that has the potential to produce bigger numbers will not idle and have the driveability that a smaller cam does with no tune...actually--the smaller cam WILL idle and drive better (and might produce better numbers) than the bigger cam without a tune.

If testing cams, then having a seasoned tuner available to tune the motor for the cam is a must. You will never be able to get the full benefits of a cam swap and will not know each cam's true power potential without having a good tune done for each cam/springs combo.