Flywheel ? for the /6 guys

You can drill the one offset hole to make it work with a slant 6.
I have done that with the SFI approved 904 flexplates for the LA engines to have them work with my slants as needed.

What is the center crank flange hole diameter?

@junkyardhero Are you speaking about 273 LA Bellhousings? if so then yes this is the perfect part for those cars.