As previously stated, oil leaking form sbc head gasket is very rare, only a drain back to pan is used in the sbc head, no oil pressure feed through head gasket is used. most likely culprit is intake or valve cover gaskets, Intake end seal will follow head gasket to back exhaust port. Use a mirror to inspect after cleaning and running at some rpm to verify.
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64 Lemans hardtop
4spd, buckets
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