250 ENGINE ASSEMBLY GMC GROUP 0 413 BOLT REINFORCEMENT Valve Rocker Cover NOTE 1 Use with 180016 Bolt 73 74 All Blazer Jimmy 75 77 C 1 Sub 75 77 K l Blazer K Jimmy K 180016 I 28 BOLT I 20 x I 8 900 8 0875A 75 77 C l Cab exc HJ Chassis 75 77 G l 75 Blazer C Jimmy C 352173 A R 1 06 BOLT 8 0875A 78 All 388708 A R 28 BOLT fig hex 20 x u Z 2751M 8 0875A 73 74 All Blazer Jimmy 75 78 C 1 Sub 75 78 K 1 Blazer K Jimmy K 75 76 C 1 Cab w H D Chassis 78 Blazer C Jimmy C 3877B70A R 26 REINFORCEMENT 1 z 0 L Note 1 8 0665A 75 76 C 1 Cab exc H D Chassis 75 76 G 1 75 Blazer C Jimmy C 352172 11 33 REINFORCEMENT 8 0665A 0 423 GASKET Valve Rocker Cover NOTE For 1977 78 use silicone rubber sealant Group 8 800 for angina wilh HTV formed in place gasket 73 74 All Blazer Jimmy 75 76 C l Sub 75 76 K l Blazer K Jimmy K 75 78 C I Cab vv H D Chassis 76 Blazer C Jimmy C 3930912 I N L GASKET 8 0630A 75 76 C 1 Cab exc HD Chassis 9 zen cs 1 75 Blazer C Jimmy C 358846 1 6 15 GASKET 8 0830A 0 426 ROD ASM Valve Push 73 78 All Blazer Jimmy 3788495 12 2 65 ROD ASM 9 0 L 8 l080A 0 429 STUD BALL NUT Valve 73 78 All Blazer Jimmy 3814892 A R 1 10 STUD rocker arm ball 003 0 S 24 x 2 J blue paint 8 ll51A 73 78 Ali Blazer Jimmy 3815892 A R 1 10 STUD rocker arm hall 013 0 S 24 x 2 orange paint 8 ll51A 73 78 All Blazer Jimmy 3992294 12 64 BALL dia 8 0851A 73 78 All Blazer Jimmy 3744341 A R 52 NUT valve rocker arm adi 24 8 0990A 78 All Blazer Jimmy 485934 12 52 NUT vlv rocker arm adj 8 0990A 0 439 COVER Valve Push Rod and Cylinder Block 73 78 All Blazer Jimmy 365809 2 COVER push rod 8 0920A 0 443 GASKET Valve Push Rod and Cylinder Block Cover 73 77 All Blazer Jimmy 3920938 2 2 70 GASKET 8 0940A 0 446 BOLT STU D Valve Push Rod Cover 73 78 All Blazer Jimmy 3814350 6 55 BOLT w seal 1B x i 8 0875A 75 78 All Blazer Jimmy 352169 2 69 STUD w seal push rod cvr 8 0875A 0 459 TAPPET Valve 73 75 All Blazer Jimmy 7 76 78 C l Cab w H D Chassis 76 78 C l Sub Blazer C Jimmy C 76 78 K 1 Blazer K Jimmy K 5232450 I2 6 65 TAPPET hydraulic type 8 0980 76 77 C 1 2 Cab exc H D ka chassis 76 77 G 1 Van WAREHOUSING AND DISTRIBUTIONDIVISION OF GENERAL MOTORS CORPORATIUN LT TRUCl 51 REV 2 83 0 7 0 41 3 0 459