75 Volare

The Upper ball joint size is what's diferent. You need the Large upper b/j.
I Think the 74 Dart should have the bigger joints. But check to make sure.
If you are going to run the 440, I recomend changing the torsion bars to heavier ones.
My Dart with the 440 was a handfull with the 6cly bars in it.
I do have a set of Schumaker mounts for the conversion.
Thinking about this, there is a unique part on the front of the 67's. I think its the idler arm.