New Mr Gasket chrome timing cover kit.  This kit includes a new chrome stamped steel timing cover as well as the associated seals and hardware.  (86-92 models have to replace the entire 1-pc oil pan gasket, not included).  This cover does not include a timing tab, which requires a bolt-on timing tab based on the diameter of your balancer (not included).  Fits the following:

75-92 303/350 5.7L V8 Camaro
75-92 305/350 5.7L V8 Firebird/Trans Am
75-91 350 Corvette

NOTE : 86-92 engines will need to replace the entire pan gasket as it is a 1-pc, not 4-pcs like 85 and older...