I don't know if this is relevant info or not, but I discovered a couple years ago the Dodge used 3 different transmission mounts between 1992 and 1994 Dakotas. The 93 was a changeover year, and neither the 92 nor the 94 will work without modification, and the 93 mounts are no longer available. The truck I ran into this on was a 4x4, but I've heard they did the same thing on the 2x Dakotas.
I had to modify the crossmember to get the 94+ trans mount to work. Maybe you have the wrong crossmember for the mount you are trying to use?

I sure hope you guy get this figured out, I will be putting a 96 318 4x4 drive train on a 91 4x4 chassis soon, and will be covering this with 49 Dodge sheetmetal. I'll have enough to deal with making the sheet metal work, I don't want to have to deal with a motor/trans issue as well, but I will if I need to. Gene.

The engine is in.
To recap; it's a 94 2wd v6 Dakota that I am swapping to a 97 5.9 magnum and 727. I had to drill and tap a 1/2" plate for each side to move the motor mount forward about 2" (different for each side). Sandwiched the plate between the block and the mount.
All I can figure is the brackets on the k-frame are different from v6 to v8.
Moral of the story: don't believe anything you read on the net and only half of what you see. Other sites (not this one) said this was a "easy swap" "uses same mounts".
BTW the trans mount used is the one like 2 posts above.