340 ID help please

Hello:

I'm confused.

Is a 71 340 orange or blue?

If the block cast date is 6-71, is it a 71 or a 72 engine?

Anyone have a pic of the correct air cleaner for a '71?

Allpar says: "1970-71 engines were painted orange; they changed to blue in 1972-73, although some late 1971 engines ended up blue also." Sigh.

Thanks for any help!

Steve