Here's how I do it:

I use no marks on belt, not ness. and that just adds to the frustrations.
1st--- stick your distibutor in to make sure your on # 1 TDC and line the notch on the crank belt gear up with the mark on the oil pump. I scratched marks on the plate below the rotor before disassembly. Put your cam gear on the marks. Valves won't hit the pistons so you can turn cams around without problems , in case you have timing way off.
2nd---Very helpfull---stick a small piece of ''''''cardboard'''' between the belt and oil pump to hold the belt on the T belt crank gear. That's where it jumps off while your messing with the belt at the cam,while your not looking.
3rd- move your distib. side cam 1/2 tooth advanced of the mark. Put the belt on and wrench the gear back onto the mark.
Very important---use Black paper clip thingys to hold belt on cam gear.
Move Passenger side cam 1/2 tooth,,,again the paper clips and rock the gear back to position.
release the belt tentioner.
I ues a ratchet and crank the H.B. bolt around 2 time to be sure, with the distributor installed to make sure of 1 on TDC.
Looking at the distibutor in place, on number 1 the rotor sits at around 11:00,,,even though on the cap # 1 wire sits at about 8:00.