"Monstrosity" 1963

A rich but unscrupulous old woman plots with a scientist to have her brain implanted in the skull of a sexy young woman.

Monstrosity is a 1963 American science fiction horror film produced by Jack Pollexfen and Dean Dillman Jr. and directed by Joseph V. Mascelli. The film stars Marjorie Eaton, Frank Gerstle, Erika Peters, and Xerxes the cat.