Hello

The best would be to shop the original Porsche workshop manuals and the spare parts books. Now it is a bit complicatet as you need the spare parts book for 356B T5 body, then the upgrade to T6 body and the 356 C supplement. On workshopmanual you can work with 356B manual however some topics are shown at the 356 A manual and are not repeatet in the 356 B manual.

The 356A manual is a big book ( phonebook ) and the 356B/C manuals come in several binders.

Here in germany every Porsche dealer will sell you all the pre 1983 workshop manuals & parts books.

In the staates you will find them at the usuall parts supplieres and on ebay

Or just check out http://www.my-porsche.com/technical/tech2.htm

Grüsse

Good luck on your 356C
If you need any parts here is a place for you:

Stoddard Imported Cars, Inc.
38845 Mentor Ave.
Willoughby, Ohio 44094
440-951-1040 www.stoddard.com
Bob Accetta is the Porsche parts manager.

When you call, ask for mail order parts. You can also oder their magazines when you call, or by their website.

They have a all the parts you will need to restore your 356.