Easy way to set the dist.
With the dist out.
1) pull plugs
2) spin engine while holding finger over #1 sparkplug hole.
3) Just as soon as you start to feel compression pushing against your finger stop spinning engine.
4) Slowly turn engine until the BB lines up with the pointer in the timing hole. (You want to turn the engine in the same direction it was spinning).(if you let it spin too far you can slowly manually spin the engine in the other direction if needed).
5) Your engine should now be at the #1 plug firing position.
6) Note the position of the slot in the oil pump drive. You may have to turn it with a long shank straight slot screw driver.
7) Drop the dist in with the vacuum advance pointing towards the front of the engine and the rotor button pointing to approx 5 o'clock position. If it drops all the way in, good.
If it doesn't you may need to turn the oil pump slot to align with the dist tang.
8) If the #1 plug on the dist cap doesn't line up at the 5 o'clock position with the dist fully seated-the rotor pointed to the 5 o'clock position and the vacuum advance pointing straight towards the front of the engine, move the plug wires around until it does.
The dist turns clockwise so with #1 wire plugged into the cap at the 5 o0'clock position, going clockwise, plug your wires in, in this order, 1-5-3-6-2-4
That'll be good enough to start and run and should be real close to the final timing setting.