Engine block brass freeze plug kit compatible with Ford bb 370 429 460. 370 CID (6.1L) 1979-1991, 429 CID (7.0L) 1968-1973 & 460 CID (7.5L) 1968-1998. Freeze Plug Kit Contains: (6) 1 1/2" brass cup style freeze plugs, (1) 2 1/2" steel cup style freeze plugs, (2) 1/4" NPT steel pipe plugs & (4) 3/8" NPT steel pipe plugs.