This paper investigates the syntax of head-marking constructions, specifically those with nominals heads. The data are drawn from Luiseño, a Uto-Aztecan language from Southern California. The first construction involves the morphological marking of possessors on possessed nouns. I show that a natural account can be given if possessed nouns are considered lexeme-level expressions derived from underspecified nominal lexemes. A separate mapping is responsible for relating nouns (possessed or unpossessed) to fully case-inflected word-level expressions. I then show how elements of this analysis can be adapted to account for periphrastic expressions of oblique cases with animate nouns. In such cases, the head is a case-inflected pronominal head that takes a full noun phrase as an optional specifier. I conclude with some remarks on the relationship between the proposed analysis for nominal head-marking constructions and the treatment of nonconfigurational properties more generally.