Mikel,
Those intake manifold gaskets are not made for aluminum intake manifolds and are a stock replacement gasket for cast iron manifolds.
You should be using Mr. Gasket 307g or fel-pro 1243. These gaskets are made to make up for any inconsistencies in fit and are .060 to .065" thick and do not have a steel core like the 90109's do.
I have a pair sitting not 3 feet from me and refuse to use them on anything but a cast iron manifold