The elephant ears and mounts have no bearing on whether the mechanical linkage will work or not. What does is what level of fabrication you are willing to tackle, and you had better be willing to do more than just turn a few wrenches to accomplish a big block four speed swap. In our case we built custom linkage. The problem is that the big bell only has one ball-stud hole and does not accomodate the factory-style bracket that needs two holes. This has NOTHING to do with the mounts chosen. Whoever the "people" are that told you the elephant ears would solve your problem have NO IDEA WHAT THEY'RE TALKING ABOUT.
Before there was a Schumacher (and this is not a slam on them) people were dropping big blocks into a-bodies by making their own mounts because Chrysler wanted nearly $400 for a DC k-member. Then I saw one up close and saw how bad the workmanship was and that it was just a modified stock piece. I used the measurements off the factory piece (first mistake) and published them in Chrysler Power magazine in the late-80s (I'm not one to hoard information). Then in the early 90s I found out the measurements on the factory DC unit were wrong and the correct measurements are published at Big Block Dart. I can pull a 73-76 v-8 k-member in any local self-serve yard and spend about $20 for it. Yes, it needs to be cut and welded.