Stumbled across this library of interesting FIAT and Lancia documents on a French language Italian car enthusiasts club. http://www.italian-cars-club.com/Squadra-Beta/DOCUMENTS-TECHNIQUES/ The Hollander Interchange pages seem like they could be very useful to someone: http://www.italian-cars-club.com/Sq.../Interchangeabilite-Pieces-Fiat-Lancia-US.pdf