318 flywheel on a 360

Look at the diagram closer.
The 2 closest boltholes are faced at @ the 10 o'clock position (more like 10:30).
The other reference is to have what looks like a rectangle based off 4 bolt hole points, with the longest part of that rectangle being horizontal.

FYI, a slant six flywheel WILL bolt up to a V-8 crank, except for 1 bolt hole being half the hole's diameter off.
That would add confusion to this if you happen to have a /6 flywheel.

Mark.