You would take off the heavy link that connects the primary and secondary shafts on the passenger side. Yes you'd set initial on the manifold vacuum (drivers) side with the can operational then shorten the slots to get 35 (SB) with the vac can temporarily capped off then mix/match springs staying just under the pinging point @ WOT then plug the can back in & check for pinging in everyday varied driving conditions & if needed turning the allen wrench CCW will give less advance at a given in hg along the cans' slope