66 Barracuda Headers - Help!

Here is some pictures of mine. They have a few minor scrathes from storage that would probably polish out. They also need an over all polishing for some more shine. I guess mothers aluminum polish is suppose to work great.

Built by Smiley Custom Headers http://smileysheaders.com/ a long time ago.

edit:
1.75" measured on outside of primary tube.
3" collector

Have these now installed on my 64. Took a bit more trimming with the bigger tubes. They actually clear my master cylinder a bit better that the other cyclones I had on the car.