I am being told that this kit is not compatible and If I purchase it I will have to buy a new computer and mass air meter and fuel pump and a fuel regulator and a fuel adjuster and a chip... I am worried I am being taken advantage of by the installer..
The installer isn't trying to lead you down a wrong path. There are basically 2 options when it comes to installing a performance camshaft in a speed density car "which is what you have". Converting over to mass air on your car is the most common way to solve this issue. Tuning a speed density car to run correctly with a heads/cam/intake combination can be done but they are rather finicky, The mass air method is far more forgiving when it comes to modifications.