1 531 PLUG ADAPTER CLIP CONNECTOR ELBOW FLANGE GASKET Rl MMET RING SLEEVE SUPPORT TEE WASHER Oil Pipe and U 6 55 58 All 6 cyl 3764579 1 05 oil pressure alum or copper 0 D x O L Note 1 NOTE 1 Required when any 1959 6 cyl block or short motor is installed in 1955 58 models Reduces full pressure oiling to restricted flow Also requires Bolt 3764578 in Group 0 293 at right hand center bolt location 55 59 Ser 4 5 6 7 8 8 cyl 58 59 Ser 9 10 60 70 All 8 cyl exc 366 427 3701638 A R 05 oil pressure and tappet gallery in block V2 dia cup shaped 58 65 All 348 409 3736407 4 05 oil holes in left side of cyl cup shape Vu 0 D 58 All exc 10F 60 61 All 6 cyl 63 66 Ser 50 60 6 cyl oil press pipe in block z O D 67 68 All 6 cyl 70 Tilt 292 3835577 A R 05 block main oil gallery frt hole 0 034 61 62 All 6 cyl 444782 2 10 oil gallery hole 18 thd Vi sq socket 8 971 63 66 Ser 50 60 6 cyl 67 70 All 6 cyl 3930824 1 05 oil pressure regulator hole V1 x V 65 69 All D351 D DH478 2410624 5 05 oil gallery hole 65 67 All D351 D DH478 2381542 1 15 cyl and case or hole cup type dia 0 034 65 66 All w Air Brake D DH478 exc TDM 65 Ser 80 TDM 2389984 1 1 35 ADAPTER oil pressure gauge pipe 65 LCF w A O H B D DH478 65 66 Tilt w Tach Oil Press Gauge D DH478 exc A O H B 2443524A R 15 CLIP oil pressure gauge upper pipe at w s wiper and same at dash mat 38 53 All 3835489A R 25 CONNECTOR delivery pipe to crankcase or to oil pump V4 1 8 x 24 65 66 Tilt 4 53 D351 125620 1 20 CONNECTOR oil press gauge upper V 20 x V 27 8 963 67 68 FFC 8 cyl exc Air Equip 68 70 Ser 40 thru 60 8 cyl exc Tilt 366 427 3853958 1 20 CONNECTOR oil press gauge pipe eng end 62 LCF Diesel 62 Tilt Diesel exc I Beam axle 63 66 Ser 80 6V 53 5126453 1 1 29 ELBOW oil pump inlet 62 69 All 3 53 4 53 5119425 1 20 FLANGE oil pump inlet tube 62 LCF Diesel 62 Tilt Diesel exc I Beam axle 63 66 Ser 80 6V 53 5126454 1 21 FLANGE oil pump inlet tube 62 69 All 4 53 65 68 All 3 53 5175568 1 15 GASKET oil pump inlet tube flange 62 LCF Diesel 62 Tilt Diesel exc I Beam axle 63 66 Ser 80 6V 53 5126473 1 05 GASKET oil pump inlet elbow 54 55 All 1st Ser 3835868 1 20 GROMMET pump suction pipe moulded 6B 62 69 All 4 53 65 68 All 3 53 5127175 1 26 RING oil pump inlet tube steel white stripe 1Vi O D L 62 LCF Diesel 62 Tilt Diesel exc I Beam axle 63 66 Ser 80 6V 53 5126492 1 29 RING oil pump inlet tube seal 38 53 All 837783 1 05 SLEEVE oil dist coup ing in block Vu O D x 1 long 62 64 Ser 60 4 53 65 68 Tilt 4 53 5109469 1 1 03 SUPPORT oil pump inlet tube 62 Tilt Diesel 62 LCF Diesel exc I Beam axle 5108356 1 2 77 SUPPORT oil pump inlet tube 62 LCF Diesel w I Beam axle 63 66 Ser 80 6V 53 1st design 5162804 1 1 82 SUPPORT oil pump inlet tube 66 Ser 80 6V 53 2nd i design 5138420 1 89 SUPPORT oil pump inlet tube 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATlON P A 31S 1 531 1 531 1 66 REV 6 71