I want to block the heat crossover on my 360 w/ ported 915's. It's a warm weather engine.
The 1213's don't have the openings for the crossover. Will they work? Why don't they burn through?
Is their purpose to block the cross over, or was there an application with no crossover?
I have successfully used .030 brass sheet shim stock between the head and the gasket to block off the cross over. Cut to fit with a little over lap and some hi temp silicone and your done.
