how to align?

The flywheel will only bolt on correctly one way for, all six bolts to line up

Burch is right,.... It should only bolt on in one location. If you look at the drawing in post #2, and look at the six mounting holes, you'll notice that 2 of them are offset, making them only line up in one position. I have the same thing on my 400 in my Barracuda. It would only mount on in one position.