Could me engine timing be inaccurate

[67 twins]

Originally Posted by RustyPile

As you lowered the distributor into position, the rotor rotated a bit because the gears on the shaft are spiral cut.. This rotation is normal.. If the vacuum canister on the distributor is in a "comfortable" position after the timing is set, you're good to go.. Wanna see something that will fascinate and puzzle you a little more?? Put the timing light pickup on the #6 plug wire. Start the engine and check the timing as before...

This should not puzzle you at all. Cylinders 1 and 6 are at TDC at the same time. When 1 is on the power stroke 6 is on the intake stroke.