That and my bentley manual..

Also Lee, have you checked out the mk1 golf forum?
right... first off, you either need to use bullet points or commas as I had to read your lists like three times!

Usual places for rust - Front wings - esp passenger, where the ariel is usually located
underneath windscreen and rear window
fuel filler neck
check battery tray
If your not bothered which, Id pick the best body, use the best bits off each car and go from there..
Dinx
