440 part number questions

[69PowerWagon]

The right side exhaust manifold on my 440 has a broken ear and I'm not sure if it should be reused. I'm not sure what this 440 came out of, all I know is the casting date on the block is 1976 and the oil pan has a center sump. The part # for the right exhaust manifold is 3671936 E 1. Anyone know what the appliciation is?

[facechicken]

I will look into it more at work tomorrow but I am sure someone will beat me to the answer

[69PowerWagon]

The left exhaust manifold is shot too, its full of hair line cracks. I took the manifolds to the machine shop that is going to do the heads and the owner told me to find a new pair because "those are not worth reusing". The part number on the left manifold is 3671788. Both are rear dump type.

[69PowerWagon]

Anyone know what these manifolds are from? It will help with my search if I know what they came off of.