the duncan distortion is a sweet pickup...
some say its powerful as emg but without the battery..i like the tone..
its interesting that the late Randy design the white V with separate vol n tone..
most probably to exploit the tone ...i like his tone esp in the Tribute album lots of bite...the attack is just beautifull..(although it had been remastered)
abt the custom V`s i believe it is equipt with dimarzio super distortion (ard 1979) i think..at that time that pickup is the "in thing"..
the jackson appeared after 1980`s i believe..i hope im right ..