70 is good for naturally aspirated. 75, the difference is too meanial to notice any decline in performance, but I guess its good for boost. Idk how big the throttle bodies get for higher amounts of boost tho.
Sent from my GT-P3113 using Mustang Evolution mobile app
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.