Even so, if it was my bike I´d widen the mag mounting holes for external fine timing adjustments without fiddling with the ATD. So then you could easily advance the lot just short of pinking, depending on what sort of fuel you get. The E-Type 3.8 distributor had a knurled nut for roadside timing corrections without need for any tool. So then you´d go for minimal pinking on acceleration depending on what you just got at the filling station - one star, two star, five star - great olden times then.
Vic
Vic