l 0 413 A 0386 1201 1 1 413 COVER Y yy ILEINFORCEMENT s 42 I V L EIASIEET I I 0 310 h Q V V M Vi CYL HEAD I 164129 may 1 6 1 2 270 5 I V A V1 BALL gIE308 f nf 1 y 2 I A AL SPARK PLUG J I 3 333 0 we 4 0 4 7 f 17 Tiff 1 1 vw 33 ARM N4 j jj A4 H V V I vlrlrr W I smm D 1J Mfg 0 0 269 M svnmc HEAD O 429 rg vA1 vE CYLINDER 0 426 siuu 0 2ss ROD X cAs1 E1 a VALVE PUSH 0 297 I g Z i I K9 J VALVE S mxuAus 1 E B1 I 0 296 E e vA1 vE Q V INTAKE I I 9 II 3 IC E V Q 0 459 E 1 UFTER 1 VALVE 0 260 0 css HEAD 0 034 HOUSING CYLINDER V pLUG l I CYL HEAD V TYPICAL CYLINDER HEAD ROCKER ARM AND COVER 1968 1975 L 6 250 cu IN ENGINE I l BO I4 GM PARTS DIVISION GENERAL MOTORS CORPORAT ON BU CK 4OA I 0 000 GROUP 0 2