Well I've been thinking of porting and polishing my lower intake manifold. I recently bought a somewhat ported and polished cobra intake manifold that had been powder coated. I definitely noticed some gains but this intake isn't fully ported. So I want to port the intake that I took off the car. I'm thinking of cutting the bottom off in order to port the runners. I would then have someone weld the two pieces back together. Does anyone have any tips or a guide for doing something like this. The only thing that I really need to know is where to cut on the intake, like how far down would I start cutting. Also what would I use to cut the intake? I have a dremel but I'm not sure if thats strong enough to cut the whole thing. Any advise or help would be greatly appreciated.