Coolant line through throttle body

[TR65]

My steam line didn't go to the throttle body (2005 LS2). The Chevy book on LS swaps says the line should go to the highest point in the coolant system. I drilled a hole in the radiator and used an AN bulkhead fitting and a washer with an o-ring molded into it to attach the line.

It is interesting that with the line that way I could completely fill the radiator on the initial fill. Air kept bubbling out of that fitting in the radiator until the engine was full.

TR