Probably needs a bit more just to clear trans input shaft from the clutch disk. That spline is an inch long or more. Then you need it to go even further back for the spline to clear the clutch fingers. Are you asking because you CAN'T GET more separation or because you think what you have should be enough?
Along with wiring and bolts, checklist includes: Both shifters, starter, Crossmember and mount, clutch slave cylinder, and you have to pull the cover on the front of the bellhousing or it will hang up on the flywheel just about where you are. Forget any of those?
EDIT: I think the inspection cover may be your problem. It has to come out completely before you can separate.
Here is what stays behind: