I assume Tracy, you refer to this port.  this fitting is the same type as the heater port on the other side.  should I remove it [and if so, how? are they pressed in or threaded?] and install an AN type fitting, or simply run a -4 rubber line with a hose clamp?   Kevin

Kevin;

 

Here’s what I did with that port, which may also work for you. There is a similar port at the outlet of the water pump (I think common to all the turboed engines for turbo cooling).  Use a high-pressure 3/8” hose and hose clamps, with a right-angle fitting that you can get at your auto parts store.  Connect the rear iron port to the water pump port for bleeding the air from the rear iron during fillup.  You want to keep that hose level and below the WP port so it doesn’t trap the air. See Photo.

 

You’ll also note a blue AN fitting at the high point just past the hose connector from the pump outlet. It is an O-ring plug that I drilled in the center of the bottom; then out to the side just below the O-ring.  Loosening that plug during filling allows air to bleed out. I made up a similar fitting with a schrader valve that I can screw in there for pressure-testing the system.

 

Works well for me.

 

Al G.