Quote: STILL there is not guarantee the dist is phased ?
Correct. Due to(possible) stackup of tolerences AND different(from stock) amts of advance. The rotor is going to be moving thru an arc of a certain amt of degrees back & forth due to mech/vac adv & you want that range of motion to be centered as much as possible on the center of the metal terminal inside the cap or at least not so far off that it cant jump the large gap & misfires & I like to extend the rotor tip & narrow it w solder so all(most anyhow) of the air gap is at the spark plug where it does it's purpose(igniting the mixture) as opposed to just wasting energy jumping a gap. EDIT drill the large hole in the flat of the cap as described,run it up to speed & w your light see how close it is to the center of the terminal & on which side of it & at that point you will have max adv(mech & vac)(& note that any LESS amt of adv will move the tip more CW(BB) & CCW (SB)
