727 Linkage

Can anyone tell me just what is the difference between the 904 shift linkage and the 727 shift linkage? I installed a 727 in my collum shift 72 Dart from a 904, I have the 904 linkage, I got the kick down linkage set with some mods. but the shift linkage, I cant get the full range out of it. I can get park but not first or I can get first and not park. I have it narrowed down to the Z bar, I think the center of the hole for the rod to the trans. is wrong. Can anyone verify that? and what is the center distance from the bottom of the cross rod on the Z bar to the center of the hole for mounting the shift rod to the trans. I would like to modify what I have to work or if someone has one to sell I will take it. Thanks for the help Ed