Just as general advice.....If you do not have a FACTORY Pontiac shop manual, buy one. It will be one of the best investments that you can do for your 56 Pontiac. I'm not sure if reprints are available, but if not, a used copy can be found on ebay. Just look around for one and a fair priced one will show up, sooner or later. I was looking for a 1961 Pontiac shop manual and found one for $15.00 It did take a couple of weeks of looking, though. Chiltons and Motors Manuals are more general repair books, so a factory 1956 Pontiac shop manual would be a better choice, for your needs.