'powerpak'
 

http://www.supersixmotorsports.com/p...3PowerPaks.pdf

the stage 2 package, (look at the very bottom, my car is a '98) worth it?

anyone?

If you want more power then yeah its a good idea.

this seems pretty interesting. Do all of these parts compliment eachother, or is it safe to buy each of them one at a time?
Is there anywhere else that is recommended to buy cams, heads, and intakes?

If you have a pre 99 mustang I would recommend doing a split port swap or getting a motor out of a 4.2L f150 and swapping over.