dont rely on those rusty pipes, they can become a nightmare for you when the pan is sealed.
Get some appropriately sized galvanised pipe rolls, straighten and install/weld in place. Another thing I would love to do is fill them with high quality grease, so the cables can operate smoothly - when finally welded - spray some cold galvanize on the weld areas as the coating mustve burned off.
What do you intend to do about cables for this vintage VW - There are some places in Karachi that make custom cables for any application. I usually used them as they are cost effective and very very good quality. depending on what parts of the cable you can find/make/fabricate.