Down the track in the Wenzel's 67 Z.

[DW31S]

Could be several things, actually. Definitely appears to hit the tell-tale switch on tach, down below could be (and I don't know the set-up in Ben's car)2nd fuel pump, turn on/off fan, turn on/off 2-step (mine is wired in line-lock), turn on data log computer, etc., etc....Stock isn't what it used to be and to be class competitive all that stuff is almost mandatory. That car has been raced since new and has held many National Records and won more than it's share of National events, so I'd surmise it has the latest/greatest technology. Hard to see if Ole' Ben is using the clutch to shift....appears to be a Long shifter and I'd guess a Jerico or G-Force transmission he is rowing. GREAT video...thanks for posting.