[Marshall V. Daut]

1. Make sure the ports are even across the tops. #4 usually droops.
2. If the ports are in alignment, insert gland rings into the exhaust ports.
3. Use one of the two expensive copper gaskets with the gland rings.
4. Ensure you are using the special thick circular washers with the manifold nuts, NOT a stack of flat washers.
5. Tighten the nuts evenly and after each heating for the first few times the engine runs.

Marshall