I have pulled my intake manifold, and noticed that the gaskets that I bought to replace are not the same as the ones coming off. The difference is the middle(exhaust?) port. The new gasket does not have and opening for these ports. The old one did. Can I still use these? My engine is a 350 block(383) and the gaskets that I bought are for 283-400's so what gives. Oh yeah, a fast response is appreciated since I am working in the cold pouring rain, under some cheesey make shift tarp covering. I hate NJ.