[Paul Spotts]

The exhaust crossover changed in 1972. Pontiac placed a heat sink above the crossover making the hole smaller than 71 and older(it looks like there is 2 holes). There are 2 easy solutions to fix this. The first is a intake gasket I sell by Mr. Gasket that has no hole for the crossover. The second is to use the 72-79 intake gasket (stock) and to place a thin metal plate(stainless steel is best)on top of the gasket and have the intake hold it in place. The plate embeds itself in the gasket. The first solution allows a hole to be "blown" through the gasket allowing a heated manifold. It also will eventually cause an exhaust leak. The second solution blocks the heat altogether which is a plus for warm weather driving. You can also use the plates on the Mr Gasket gasket (solution 1)