now figured a lot of this work will be done by you...OK...
here is what i would do on your car Mustang if it were mine.
1- change gear from stock to a 411 or 373 depeneding on what your running $200
2- good 31 spline axles- $250
3- welds up rocker boxes ($100) labor if you cannot weld them in rear suspension and buy a anti Roll set up for $280 to $300 to fit a stock suspension location..most of it will bolt in with minor welding invloved.
4- purchase tublar k-member ( anthony jackson makes a good one) ..this will take 100lbs off the nose but the biggest advantage is giving larger header clearance...this is all stock location bolt on and cost $300.00
then go with after market largest head that will fit after the k-member is installed...$500 for a set of headers
5- go with either intercooled ATI pro-charger UPGRADE kit, that comes with the updated brain box computer and larger injectors this allows the cars computer to adapt to the boost being placed in the car...stay at 6 psi and no need for changing internals...this is all stock bolt on stuff...the cost is $4,000 for everything.
they make this unit just for the yerar car you have ..DIRECT BOLT ON.
6- if your tranny is a 6 speed then i would up grade the clutch and pressure plate, throw out bearing to a heavy duty..$500 cost.
if its auto matic you will want to get buy a converter to go witjh this set up and also have them up date the tranny to hold up to the higher HP.some of this can be done with e cars internal computer, such as shift points etc......you talking about $1,000 on this project if not less..
what i just told you in a nut shell would cost you around $6650 with a auto tranny and $6150 with straight drive...
its all bolt on stock suspension stuff and will make between 550-625 rwhp if done properly..it will retain its drivability and run pump gas...
there ya go !
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "