the american style date coding can be confusing if you have been taught the oz way but we shall try and explain as simply as possible...we shall use with permission from scott at concourse parts a couple of pics from his blogspot..we shall use his november 1972 hq ss as a guide...the yankee way worked on month first..then day date..then year..so L242 is november 24th 1972..this system seems to be used on the cast parts like engine exhaust manifolds diff centre section etc and was used from the beginning of holdens engine production till at least december 1972 that we can find out...mr jones if he pops in may be able to give us an exact date...so basically it is the same principal but the australians simplified it..
for more date code type pics in oz and yank versions go here to scotts blogspot
http://hqdatecodes.blogspot.com/
something interesting about the date coding on the early hq is that there is a combination throughout scotts ss that is both types.
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