Ignition timing question

[Big Rob]

6 - 8 deg before TDC. Vac advance direct to manifold. And Run 95 or 98, preferably 98 in it.

As is often coincidental, I did the timing on the HZ this morning after replacing the distributor cap, rotor, points & plugs.
Points at 15thou, plugs at 35thou, ignition timing at 8deg advanced at idle with vac advance disconnected and plugged.
After reconnecting vac advance and deleting the stupid plastic restrictive green and white thing that was between the vac source and the distributor it goes like it should. The restrictor thing was stopping the timing advancing when the engine was revved.... no such issue now.
And as Bobsmith says... 98 only plus valve saver.