timing gear alignment.

Then you align the dots, install the distributor in pointing to #1 and get back to me on how well it runs, because it will NOT
Explain!

I don't see how it can be any other way.

The crank gear can only go on one way.

The cam gear can only go on one way.

With the dots aligned per the FSM you are good to go.

(Timing the distributer is a separate matter)

If you set the crank to have the #6 ( your words) cylinder at tdc then that would make the dot at 12:00. There is no other position that the dot is at 12:00 on the crank.

Same holds true for the cam. There is only 1 position that the cam gear dot will be pointing to 6:00 and I assume based on your statement that #6 is that position, then the cam will be on the #6 compression stroke.