This handy kit includes one steel 5/8"-18 IFM power steering box to -6 AN hose adapter fitting and one steel 1/2"-20 IFM power steering box or radiator transmission cooler line port to -6 AN hose adapter fitting. Note: Inverted flare are used on most GM steering boxes through 1977. O-ring fittings are used later model GM metric boxes from 1978-up. Item Details Fits most 1965-79 GM power steering boxes with flare fittings.