5.9L and 518 into 73' Duster

Couldn't really find one forum where this post belonged, but I suppose most of my question has to do with the 518 AT going into a 73' Duster. It has been a long time since I looked into the 518 vs. the 727. But the questions I have are:

Does the 518 have the same rear mounting location and bell-housing bolt pattern as a 727?

Is the 518 larger enough than the 727 to require some tunnel "massaging" to get it to fit?

Also, the 5.9L...motor mount holes the same as on a 73' era 318?

Sorry if this isn't the right area, not sure where else to put it.