3/8" line w/ one outlet works for 3.2L, 3.8L 6-cyl, 4.6L, 5.4L, 6.5L V8 Chevelle and El Camino. works for 3.8L 6-cyl, 5.3L, 6.4L V8 GTO, LeMans, and Tempest. works for 3.7L, 4.1L 6-cyl, 5.4L, 6.6L V8 Cutlass, 442, and F85. works for 3.7L 6-cyl, 4.9L,...