i am adding a 6al box to my 1971 duster with a 380hp 360 crate motor. nothing done to the motor,just as it came from the factory. my question is,is the 7000 rpm limit chip too much to rev this motor to,or should i use the 6000? i am leaning toward the safe side with the 6000! i have a buddy i can get a 6500 from. i am going to use the car mostly for curves and autocrossing,maybe a little drag racing and stop light action