Anyone running these manifolds?

I have a 65 with a mannual box. I milled the drivers side down .020, and changed the coupler out for an universal joint. It's tight but it works. They flow much better then the 273 manifolds. One thing you might want to do is grind out the bottom of the port on the manifold, because it sits higher then the non Magnum head exhaust port which may restrict flow a bit