Another flywheel question.

Ok, I'm confused. I have a '74 360 that Ian and I are putting in his Duster. I have the flywheel from the Duster which is a 318. I researched the subject before finding FABO and read that the 318 flywheel will cause no problem if the 318 crank was cast and not forged? Is this correct? I have searched through this forum and have read that my '71 318 flywheel will NOT work on the '74 360. So which is it? The engine is almost together and since its fighting me the whole way, I figure that not only will I have to come up with a 360 flywheel, but my new clutch kit wont bolt up to the 360 either and will have to buy another kit. :banghead: