1970 340 air cleaner dimensions?

I need to get off my butt and go back to the metal fab guy who said he could bend a piece of 1/4 or 3/8 flat bar to match the radius of the 70 air cleaner. If he can do that, I will make a crack at shaping the oval opening by hand. My buddy is 82 and a Master Machinist, so he can probably come up with a way to make the openings on a Mill or something. All I gotta do is tell him I don't think it can be done!

:lol: