Ok developed a rough idle Sat and have discovered an air leak on the intake manifold. I removed the manifold about 4 mo ago to install a new wire harness but did not use a torque wrench to tighten the nuts. So looks like I will have to replace the gasket and break out the torque wrench when re installing. What is the proper torque for these nuts, and should I use some gasket sealer to ensure no leaks?

Thanks Steve