It doesn't matter. When the number one cylinder is at top dead center, pull the distributor cap. The rotor is now pointing to number one. Where the cap fits, that terminal is number one. Take that wire to cylinder one. Follow the firing order 1-8-4-3-6-5-7-2 and the next terminal goes to the next plug which is 8, then 4...etc. Clockwise!!!
Well it does matter... If he has the distributor dropped in a couple of teeth off the vacuum advance will be pointed at..... the alternator?? not so bad.. The leaking dual feed to the carb OH NOOOO!!
If memory serves me... Vac advance should be at.... 8:00 ??? If it isnt.. pull the distibutor back out and bump it over to get it in the right spot..