PISTON CHART STD 001 O S 020 O S 030 O S 040 O S S5 56 ALL 285 3732021 3732023 3759914 3732027 3732029 NOTE Four cast valve relief pockets in top of each piston 55 58 ALL 261 3758650 3707474 3758654 55 62 ALL 235 3707453 3707473 3707454 3707455 3707456 55 62 ALL 261 3758652 3758653 56 59 ALL 322 3752042 T 3752043 T 3752044 T TNOTE Balance Weight Unit 3751840 must be used with initial installation of these pistons See Group 0 662 57 59 ALL 283 exc L D 60 61 Ser 60 283 3758663 3758664 3758665 3758666 3758667 59 Ser 6 w L D 283 60 66 Ser 40 50 230 283 3860407 3860413 3860417 3860426 3860432 59 62 ALL 261 3758650 3758651 3758654 58 61 ALL 348 3752631 3752632 3752633 3752634 3752635 62 66 Ser 60 327 381 6974 3816975 3816976 3816977 62 65 ALL 348 3816650 3816651 3816647 3816648 3816649 62 65 ALL 409 3816640 3816641 3816637 3816638 3816639 62 64 DIESEL lst design 5195931 G NOTE 17 to 1 comp ratio 64 66 ALL 159 212 318 2nd design 5197866tBA 63 66 Ser 50 60 292 3794494 3794495 3794496 3794497 3794498 66 Ser 50 250 3886048 3886049 3886050 3886051 66 ALL 366 3886172 3886173 3886174 3886175 ANOTE 21 to 1 comp ratio GBNOTE Consists of 1 Piston Assy w bushing and 2 piston pin retainers STD STD STD 005 O S 020 O S 040 cyls 1 2 cyls 3 4 cyls 5 6 all cyls all cyls all cyls 65 66 ALL 351 24648580 24648590 246486 0o 24722160 24648540 24648550 65 66 ALL 478 24648610 24648620 24648630 24722170 24648560 24648570 Y A 0 633 BUSHING NOZZLE Piston 62 66 ALL 212 318 rod and pin bronze 1 O D x 34 5116181l A R 83 62 66 ALL 159 212 318 NOZZLE piston spray 5150140l A R 44 0 636 PIN Piston STD 0015 O S 003 O S 005 O S Length 55 62 ALL 235 3743024 3703686 370488169 3704882 3 6 1 32 55 62 ALL 261 3743023 3707495 3707496 3707497 3 6 1 40 56 S9 ALL 322 1162051 g 1 45 62 66 ALL 159 212 318 5116189 I A R 2 56 STD 001 O S 002 O S 65 66 ALL 478 24489520 24489530 24489540 A R 3 40 65 66 ALL 351 24519980 24519990 24520000 A R 3 10 GBNOTE This part is eligible for wholesale compensation 0 639 RETAINER RING Piston Pin A 62 66 ALL 159 212 318 518025fl A R 11 65 66 ALL 351 478 RING retaining 24489510 12 16 1966 Chevrolet Motor Division 99 0 629 0 639 General Motors Corporotion HDT REVISED MAY I 1966