If you use the UR fitting on the pan I would be very concerned about it cracking. That fitting weighs a ton and I'm pretty sure that after a little time you will get fatigue cracks. Take my advice and go with the light weight fitting.

 

Oh trust me we will. That thing only has about two threads to work with as it is and the design just blows. I searched high and low but couldn't find what I wanted in time so we used that to get through the tune. I am going to get a nice aluminium piece ultimatley and have it Tig'd into the Mugen pan. Thanks again man,
-C