Help decode a hemi intake

Got these numbers off a chrysler firepower intake. Was unable to get any other numbers off of the engine. It is a 4v. Can anyone tell me what it is by these. "MY" (is above the numbers) , 1555473-1 with 19-55 upside down underneath.

 

Hmmmmmmm.1955-56 354

 

I couldn't find anything, hope someone else can.

 

1555473 is listed as Chrysler, Pass. car, 4bbl, 1955
And that means it would fit 331, 354, and 392 V8s

 

Thank you.

 

My book tells me intake number 1555473 is from 1955 301 2v engine. the 301 version didn't use hemi heads used poly heads & was know as a spitfire.
Also intake number 155473-1 is 1956 354 note is missing a 5.
Hope this helps

 

Nick-the-kiwi, these are definitely not poly heads, is a 4v and has chrysler firepower valve covers. ???? Thanks for looking though.