If the distributor is in and it ran, just look to the rotor position. If not, remove all the plugs and turn the crank by hand with your thumb over the #1 spark plug hole, when it starts to push air, youll know its on the compression stroke. You can put a popsicle stick in there and watch it rise while you turn the crank by hand. Piston stops are better: thread it in, and run the piston up BY HAND with the crank until it touches stop and mark the balancer at the TDC pointer, now run the crank the opposite way BY HAND and touch the stop again, mark the balancer at TDC pointer again. remove piston stop and turn crank so TDC pointer is exactly 1/2 way between the 2 marks (shortest distance) that is TDC of that piston. All the rest are 90 from that point. Your balancer should be marked very close to this on #1 (driver side front cylinder) if not dead on. If its a few degrees off, your balancer may have moved as that ring is on bonded rubber that can seperate over time and cause the ring to shift.
