I just installed my GT350 aluminum intake last year. I used the fel pro gaskets and the cork ends. Clean the intake and heads very well and make sure they are smooth. I used a DA sander on the intake side to clean it up. Use weatherstrip adhesive to glue the cork pieces to the block first and let dry. I also used the copper spray on the side gaskets to help hold them to the block. Black RTV on the 4 spots that the cork meets the gaskets. About the size of a dime or less. I believe most people advise using a thin layer of RTV around the water jackets as well. Make sure the intake drops straight down over the studs and doesn't move front or back while you start the torque sequence.