Clamp everything in place and establish a line on the tubes for a cut line. I came off the firewall square from the edge of the shutters and scribed a light line on the bluing.
Using a surface gage and a vice, manipulate the part to establish a plane, (balance three points along the line), clamp firmly and scribe the line all the way around the tube. It won't be perfect but this gets you pretty close.
Trim the ends and fit to straight pipe that goes through top of carb flange.
Trim straight pipe to 8 inches. Light pressure lines everything up for tacking. That's for tomorrow.