You need "DOT 4" brake fluid, has a higher boiling point than regular DOT 3 fluid used in older American iron.

Some brands include Castrol LMA,ATE Superblau(sic), and others.

By all means, avoid "DOT 5", or any type of synthetic brake fluid.

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"I was a dirty bird, Carol's not grungey - she's *****in" John Milner....American Graffiti