I just bought a used Performer intake for my Olds from Tom at JBP.
I also have a new set of Felpro gaskets like this:
http://static.summitracing.com/globa...fpp-1356_w.jpg
Notice there are no holes for the exhaust crossovers. I was going to buy the plugs to block the crossover in the intake but was wondering if this kind of gasket alone would be sufficient to block the crossover, or would it burn through?
I know on a Chevy that type of gasket is sufficient, but on an Olds I'm not sure. I've been told that the crossovers on Olds heads need to be blocked off. I remember when I bought a Performer intake for an Olds it came with a couple of iron plugs that you grind to fit the crossover holes. The problem seemed to be that the manifold would warp in that area due to the high exhaust temps on an Olds. This problem apparently doesn't exist on a Chevy (at least not that I've heard of anyway) but on the Olds it apparently does. Personally I don't see how it could be a problem on one engine, and not on another.