I am in the process of an engine swap. I have the upper and lower intake manifolds off. I notice on the underside of the lower intake manifold there is some damage. There is some missing chamber wall between the injector and the chamber on one side. Is this a serious issue or can I ignore it and reuse this part? The material here is really thin and the ones I viewed on Ebay are missing the material here as well. Your help and thoughts are greatly appreciated. I'll try and upload a picture in the next day or two.

 

I should mention this is a 1986 non turbo 300zx.