chuck, another way to look at this, is to say, you can buy the alum heads and they are not ported to the max, stock they outflow the power heads or they are equal, but that is unported. you still have alot more you can go with them. plus you have the weight savings, your old heads, and a superior design. alum heads are not just a better version of the stock head, it is a better design, so while the power heads are worked to the max to keep up with the alum heads, the alum heads have alot more potential. i purchased the gt-40x heads because i wanted a head that ford put out so i wouldn't have to worry about them not being reliable (not that all alum heads aren't) but after 3 yrs i have had not 1 problem with them. impressive gain and stock type reliablity. good luck. i hope this made sense
brian
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GT-40X heads(58cc), Cobra upper and lower, 75 mm Bullet, Moroso fenderwell induction, FRPP 65mm TB, 24# injectors, black magic electric fan, phenolic spacer, 1.7 crane cobra roller rockers, crane 2031, BBK 1 5/8 equal length hearders, 2.5 inch off road pipe, 2.5 flowmaster catback, FMS 3.55 gears, T5-Z transmission, FRPP aluminum driveshaft, svo heavy duty clutch, mcleod bullet proff bellhousing, BBK adjustable cluth quadrant, hurst billet shifter, lakewood subframes, BBK strut tower brace, BBK 2pt lower cross bar, FMS 190 lph fuel pump, crane ps91 coil, FMS street pulleys, and 300+ race wires. All thanks goes to my wife sheri, jason, jeff, robby, my dad and all others you helped contribute. most importantly GOD!!!
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