66-68 Valve Cover Engine Code Decal "IM" L68 400HP 4 Speed
Note: Valve Cover Engine Code Decals are mounted on rear vertical surface of RH valve cover. Valve cover engine code letter kit, IM. 1968 427 L68 w/400 h.p., Holley 3x2 BC and 4-speed transmission. 1966-67 427 L36 w/390 h.p., special cam, hyd. lifters, K19 and 4-speed transmission.