Ok so I made 3 and sold one, also sold flanges and tubing to a couple of people.
I measured up an NE-5 intake port and drew up a flange. The ports are .020” off center left to right so I made the flanges .010” off and was careful to make sure they were welded in the right direction. The port is also off from the line between the flange bolt holes and it is all correct. The step file is buried in my computer.
The flanges were lasered with big hole at .998” and chamfered significantly, a 1” ERW tube was then press fit and welded into the back chamfer.
I did these before I had a belt sander, so it took me a long time to sand them by hand on a piece of granite and I didn’t fill pinholes like I wanted. I can build them up and sand them down in minutes now if needed (it took me 4 hours of sanding like this to shave a 212 head .067” once).
I like my intake manifolds clearcoated. The only clear I have found that doesn’t allow the metal to rust is clear exhaust paint that I have to bake in the oven. It leaves
a pleasant amber shade.
