Technical ‘56 or ‘66 GM Intake?

looking for the model year of this #3887107 two barrel intake please.

 

Its actually 3837107...its a 1956 intake

 

Cast January 27th to be exact.

 

Thanks! Not the first time I have mixed up casting numbers.

 

If you know your carb bases .. they were way different from 56 to 66 to 76 to 86

 

I don’t know my carb bases. The two barrels from ‘55 on all look the same to me. I was going to put a newer ‘70 Rochester on this.

 

There's a small base and a large base for the 2bbl Rochesters. 70's where big base.

https://www.jalopyjournal.com/forum/threads/rochester-2bbl-large-base-vs-small-base-dims.181649/

 

The intakes look different, you'll find a choke stove on the 66 intake, but not the 56. The large carb bases were not used on all the 2bbl engines, you'll find a small base on a 307, large on a 350, iirc.

 

Thanks Squirrel, I think the 2 bbl is from a 307.