Are you asking about the old Z700 series, or the newer ZTrak's? I owned a Z720 a couple years ago, and own a Z950 now. I am not certain that everything (pulley sizes etc) is the same, but the mounting points are.
As far as I know, neither of them will accept decks from the older 700 series Z's.
Originally Posted by Darryl G
I can also tell by looking back to see how they're hanging and often reach back and feel them to see how firm they are.