Why in hell do that when you can just as easily do it RIGHT THE FIRST TIME??
Either
1.....Pull the no1 plug, stick your finger in, bump the starter until you feel compression, bring the engine up to the timing marks where you want it timed, and drop it in or
2.....If the valve covers are off, bring it up to TDC and look at the no1 and no6 valves. Whichever pair is closed, that cylinder is ready to fire