What are stock 360 exhaust manifolds?

I have an '85 block 360 that I am having work done on it and I dropped the exhaust manifolds off to get cleaned up and resurfaced. My question is this... What do the stock 360 manifolds look like? and also if these are '85 model exhaust manifolds would they differ in size and appearance? These have a center dump and I wasn't sure if all 360 manifolds had these. I just want to make sure these manifolds would be able to fit fine in my '74 duster.

I have numbers for both sides. The driver side cast number is 4227637 and the passenger side is 3870055.

Pictures of these would be nice if you have any. Thanks again !

Aaron