Heated PCV delete
This is the procedure for setup. IMO, it's not necessary to keep it on your car, especially considering most Bullitts did not come with this setup, the parts are obsolete, and the standard Mustang GT did not have this setup either. You can replace the broken T-Fitting if you'd like but it'll just break again. If you don't want to deal with this, here's how to delete your heated PCV valve setup and eliminate the T-Fitting altogether.
Removal of the following parts is required:
The obsolete inlet heater hose setup with the T-Fitting, in addition to the heater hose that goes from the T-Fitting to the back of the intake manifold.
The coolant line that goes from the T-Fitting to the intake plenum where the PCV hose attaches to
The coolant line from the intake plenum to the passenger side pcv valve
The coolant line from the pcv valve to the port on the front of the intake
Install a 1999-2004 Mustang GT inlet heater hose, part number KH88
Install a 3/8 NPT plug in the port on the front of the intake. This is the port for the coolant line that routes from the passenger side pcv valve to the front of the intake manifold. When you install the plug, make sure you use thread sealer to avoid leakage.
That's all I did, it was that simple. The ports on the intake plenum that the pcv coolant lines go to is nothing more then a pass through for the coolant. Coolant doesn't actually flow through the intake plenum. You can cap them off with a vacuum cap or leave them be.