1999 Buick Century Custom replacing intake manifold gasket

I am repairing my 1999 buick century custom atm. I have the manifold off. But where I live they dont have reliable mechanics with HONEST based knowlege and experience. I havent put the manifold back on as I have a problem with this design of the gasket. The rubber around the ports on the gasket itself being very thin and the gasket being plastic. The kit calls for ONLY placing silicone on the block front and back ends and where the pins/pegs on the gasket go. I have a real problem with this as it doesnt seem feasible that it will hold to me and some one here told me that their shop makes their own rubber gaskets for the front and back ends.I dont see how they do that because of where the gasket sits near the ends of the block. The plastic gasket almost touches the block on the bottoms of it and I argued that when you torque the manifold down it could crack the gasket there because using the rubber would bring the manifold higher up when it sits on it but I need to know if anyone has done this as its not what the OE calls for using rubber. Up til now all the engines I have ever rebuilt I always use RTV around the entire ends and around the block then on top of the gasket. I have never had an engine leak before, and I have never dealt with this plastic design of gasket before. I also looked this up and apparently Buick has has many problems with this design on many of their models from around 1995 and up. Lol I can see why. Can someone please give me a heads up otherwise I will just use RTV (thinner amts on the gasket itself) as I have in the past on other manifold gaskets. I dont want to have to take this off again. Also I am NOT flushing the system and putting the factory coolant in it I will put the universal coolant in it that is for all vehicle makes. Need someones advice that has dealt with this problem before. Thank you. Angelicabear