1971 Formula Breather?

[murphy4600]

I'm trying to go back original on my '71 Formula (non HO) 455. Can someone tell me what the original Breather was. Single or dual snorkel, long short????

 

[melsg5]

here is a 1971 400 Formula that he is converting to Ram Air. The air cleaner assembly is a dual snorkel. The 400 and 455 use the same air cleaner assembly.
https://www.youtube.com/watch?v=idTfolcpBck