Valve covers

1991 OCC.  Changing valve cover gaskets as part of preventive maintenance.  Understand that by 1991 the differences between the Chevy 305 and Olds 305 were gone in favore of a "corporate".  Rather than sandblast and paint original valve covers came across these but they're speced for SBC 305.  Will they fit without problem?

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it is a Chevy 305 in all 91 B-Bodies (except for police cars, they got a 350) with center bolt, so yeah I would think they should fit.

They will "fit" but I only see one large hole in each cover. The driver side needs a smaller hole for the PCV Valve. Been a long time since I was under the hood of a TBI car but I believe the passenger side has a smaller hole in the factory one as well.

good point, 94Woody. The 91 305 has a PCV grommet in each side. What's missing from these is the oil filler cap opening. They won't work. THX

You can use a different oil filler. They make them with grommets on the valve cover, and a push in cap. I have that style of filler on my 454. The issue with these is that the extra hole would look odd without the "flat" to mount it.