Reproductions of the popular, yet hard to find 1964-72 A-body lower control arms are coated and have the same fit and appearance as the factory arms. While both arms are made to meet the same tolerance as the original, the deluxe arms are a version that have a more precise spring pocket to better accept springs with larger wire diameters typically found with heavier rated racing springs and offer more consistent suspension geometry. These accept 5 inch springs just as originals. Use 1.645 for rear bushing, 1.345 for front bushing. Ball joint hole size is estimated at 1.980 inch.