Manifold end gaskets for the later-model engines with the rubber nibs that fit into holes drilled into the block are a lot less likely to slip out of position, particularly if a little gasket glue is used to hold them into place during assembly. I have been known to drill those holes into earlier engines, using the gaskets as a template. A little care and caution when fitting the manifold prevents most of the gasket-slippage problems.
Jerry
Last edited by Hotrod Lincoln; 12/21/2008 7:14 PM.