Inliners International Forums General Discussion Engines thread sealant/head gasket choice

Inliners,
What's the preferred choice for thread sealant(head bolts)on a 292 Chevy? Also,which head gasket should I use with a 292 bottom end and a 250 top?(integral) Fel-pro and NAPA both show a different head gasket for these motors.(292/250)...thanks