ORIGINAL: SOHCtimes2

OK, if you really want to make it fast...don't waste your time and money with simple boltons. Save up and get yourself a supercharger, you can get a really good deal on used ones off ebay or from some of the mustang forums. You could check out www.modularpowerhouse.com for their Mongoose kit (everything u need to s/c and get it running).

Since you have an automatic I would also suggest a stall, shift kit, trans cooler, etc...Kinda wish I had an auto sometimes to be honest. Gears are good too, which ones to get though are up to you and what your goals/plans are for the car. I S/C'd mine and still have stock gears, plan on going with 3.73's though because I plan to be putting down 400-500rwhp in the future and feel that 4.10s would be too much.