KB

Here is the warning form the Edelbrock website I referred to:

CAUTION: Always use new gaskets as recommended. Check
with gasket manufacturer for compatibility with aluminum
intake manifolds. We recommend Fel-Pro Printoseal gaskets.
The use of Permatorque gaskets can lead to improper sealing
due to the hardness of the gasket. Don't use Permatorque
gaskets.

Here's a link to the document:

http://www.edelbrock.com/automotive_...e_Manifold.pdf

Don't blame you for being skeptical of the explination. Just passing on info from someone who had delt with far more of these manifolds than me.

Mike