Funny you should say that, after Meziere recommending that I run at least a -20 AN upper Radiator return line since it's a street car, the hunt began to find something that met my needs for a (non traditional straight up) Mopar thermostat housing with a -20 AN fitting. I'll save you the trouble of looking and just tell you it does not exist...I tried all the major Cooling companies and even some small Custom shops...So here we go again, looks like I'm making a Stupid Upper Thermostat housing that will use a Mopar Thermostat and have as low of a 90 degree profile as possible and point straight forward, here are some progress pics, it's made from 6061T-6 Aluminum and just needs Tig Welded together to be completed. I still need to add a -20AN fitting to the Upper Radiator tube coming off the radiator. Enjoy