Hi guys,
Could use some advice on a GMC 228 exhaust manifold I purchased on eBay. I cleaned it up and found the mount flanges considerably corroded (see attached photos). Can these faces be machined to clean up? If needed can they be weld repaired to build up the faces, then be machined?

Thank you for any input.
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IMG_6201.jpeg (285.56 KB, 55 downloads)
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