Doesn't matter. If no.1 cyl is on true TDC, then leave the vac advance at 6 o'clock, then 'spiky wheel' in the dizzy should be lined up with one of the spikes on the outer ring. Make that Number 1 spark lead. Then anticlockwise 1-3-7-2-6-5-4-8. Try not to run no.6 and 5 leads parallel to each other, as they can crossfire. Lead separators are cheap enough, or a couple of cable ties to hold them apart.