To save a little turning, hold your finger over #1 spark plug hole while someone bumps the starter. When you feel air blowing out, that is compression. The timing marks should be coming up pretty quick. Or you can use a push button switch with wires run down to the starter, then you can bump the starter while watching valves and checking for compression. Any momentary on/off switch will work, one lead to the (+) terminal of the battery, the other to the ( s ) terminal on the starter solenoid.
Always double check the valves opening and closing on #6 and #1.
Rotate the oil pump to align the slot for the distributor, most of the time you need to turn it a few degrees farther to compensate for the spiral of the timing gears.
Joe