Shift Kit

alright so I'm assembling the VB right now and I seem to be missing the shuttle valve but what's weird is that I've kept everything together so I'm not quite sure where it would have gone and I checked the other VB I have (from an 84 904) and it doesn't have it either. Is it only on some and not on others or do I need to find this thing?

All I've ever saw had a shuttle valve. Are you sure your not over looking it? The shuttle valve is a valve held in place by a E-clip. It's right under the cover on the top of the valve body that has 6 screws holding it on.