Ok, so after being unable to source an EGR cooler coolant line for the past week or so, I've gone back to a T in the heater hose. I'm going to draw from the heater core return and dump into the coolant drain plug on the driver's side. I wanted to get it all installed today, but I got tied up at work until late every day this week and was unable to buy the hoses and fittings and other random bits to get it done.
So today I picked all that stuff up. I need to get my mounting bracket holes drilled a smidge wider, and I'm going to get this rig for the drain port drilled out some while I'm at the machine shop. That should help it flow a bit more.
The first picture is the fitting broken down, 3/4 barb to something flared in the middle to M16x1.5. The second pic is through the barb with the whole thing together to show the restriction. The third shows the barb without the other parts, the fourth is the flared in-betweenie, and the fifth is the M16x1.5 side of the other adaptor.