Most aftermarket cams and PI cams can't be used in the pre 96 nPI heads or so it seems. Intake will be fine, but for the PI intake you need way more than the intake and a few things like the 96+ cars, like fuel rails, the fuel line to the filter, and the intake like Johnny mentions. Basically you need to convert the fuel and air system to 96/97 Thunderbird setup, the wires in the bundle you need to deal with, maybe EGR, I looked into it when I was shopping for a new car to replace the 89, so I got a 97 instead (well, I was looking for a Mark VIII) because I known what would be happening around the miles they would have and the clogged EGR passages among other things.