360 Scamp Fender well headers

Hello Members.
I have a buddy of mine that is building a Pro Street Scamp that wants fender well headers installed, from all the places to buy then from you can only order 62-66 years and not anything newer like 67 and newer.

Someone told him that the frame is 3" wide so they will not fix his abody.
They seem to make ones for a big block but none for a small block like the 360 going into his car....

Can anyone help.....

Thanks