The pump is directly geared to the cam, the dizzy has nothing to do with driving the pump, only shares using the same gear on the cam itself.
To the OP, I blueprint every pump I install, use an anerobic sealant on the mating surfaces, and "prime" them with a drizzle of STP/Motor Honey etc., and give a few hand turns before installing. I fill filters about 50% (if practicable), and install, messy on a slanty.
My "Killer6" got a remote filter kit, and put the filter open end up, accessible thru" the "K" in the K-frame.