Vintage Air Airconditioner brackets

G’day all,

I am looking at A/C brackets for an LA block and the Vintage air site has two to choose from, “early to 1969” and “1970 to 1978”. Can anyone tell me the difference between the two?

I know over here in OZ early LA blocks have the short nose cast iron water pump and later ones have the alloy long nose one. The bit that is confusing me is the instructions for the early LA brackets show the alternator on the passenger side of the block (drivers side for you U.S. folk).

Just don’t want to get the wrong one sent all the way over here!

Cheers
Anthony