I guess this problem has probabely been addressed before.
Bur I am a NEWBIE .
What is the permanent solution for manifold with leaking gaskets , on a P-30 454 engine on a 85 regal .
thank-you

If you are talking about where the manifold meets the heads, drill the holes oversize, use new Chevrolet bolts and hardened washers. Cut a slot between each cylinder with a hacksaw or cutting wheel. Have a machine shop surface grind the manifold. Use red silicone rubber as a gasket. Torque to 40 ft lbs in 10 lb increments from the inside out. Use an anti seize on the threads. Retorque on a hot engine after one trip. Chevrolet does not use a gasket. Many experienced mechanics have varying opinions on the gasket issue.

After all that, it will warp again, but not too soon. Install a right side splash shield. Avoid heat soak by idling for a little while before shut down after a hot run. Or have a thermostat controlled electric puller fan that does it for you.

Best is Thorley headers. More power, too.