4 250 ENGINE ASSEMBLY 1 0 153 SHIM UNIT Crankshaft Bearing Cap 71 72 All 3911010A R front and intermediate use only w 2 bolt cap 71 72 AII 3928985 A R rear 0 206 COVER ASSY Crankcase Front End 71 72 All Q 3996616 1 a 0 207 GASKET Crankcase Front End Cover 71 72 All 3923472 1 0 213 SEAL Crankcase Front End Cover I 71 72 All 3980267 1 2 7 O D stamped 3980267 1 0 269 HEAD Cylinder 71 72 All 6259693 1 w studs 0 289 GASKET Cylinder Head NOTE 1 Units consist of cyl head rocker cover pushrod cover manifold thermostathousing and water outlet gasket exhaust pipe packing and valve stem oil seals 71 72 All 355754 1 28 0 L l 71 72 All 345030 1 GASKET UNIT Note 1 0 293 BOLT Cylinder Head L I 71 72 All 3788417 14 R 13 x 3 M 0 296 VALVE Inlet NOTE See Dealer Price Schedule P A 26 for applicable prices L STD 003 0 S 015 0 S 030 0 S V 71 72 All exc L P Gas 3989088 3997749 3997750 3997751 71 72 A11 w L P Gas 3989086 3994295 3994296 3994297 0 297 VALVE Exhaust NOTE See Dealer Price Schedule P A 26 for applicable prices STD 003 0 S 015 0 S 030 O S I 3 71 72 All exc L P Gas L 329275 3995602 3995603 3995604 71 72 AII w L P Gas 1 3989089 3997726 3997727 3997728 0 303 SPRING Valve 71 72 All 3864895 12 0 308 SEAL SHIELD Valve Spring Cap 71 72 All 3835333 A R valve stem oil 71 72 All 3836755A R SHIELD cup l D x 1 O D 0 309 CAP Valve Spring 71 72 All 3729363 A R 1 i O D stamped H 0 310 KEY Valve Stem 71 72 All 838029A R 1 o D x long 0 333 ARM Valve Rocker A 71 72 All 5723551 12 0 386 COVER ASSY GROMMET Valve Rocker Arm 71 All 3994204 1 w cap 72 All 6259798 1 w grommet 71 72 All 3894337A R GROMMET 1 745 1 1 D x 1 O D I 0 413 BOLT REINFORCEMENT Valve Rocker Cover NOTE 1 Use with 180016 Bolt 71 72 All 180016 1 A V 20 x Z 71 72 All 3877670A R REINFORCEMENT 1 O L Note 1 0 423 GASKET Valve Rocker Cover R 3930912 71 72 All 1 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM 0 153 0 423 0 so REV 5 79