66 70 All Blazer 250 exc L P 4 Gas 3886048 3886049 3886050 3886051 67 70 All 3 53 5198877 68 70 All Blazer 307 3923294 3923295 3923296 3923297 69 All Blazer 350 exc light duty 70 All w L P Gas 350 3947746 3947748 3947750 3947752 69 All w light duty 350 70 All Blazer 350 exc L P Gas 3911020 3911021 3911022 3911023 69 70 All w L P Gas 250 3953798 3962006 69 70 All w L P Gas 292 3962018 3962019 70 All 396 L H 3969981 3969983 3969985 3969987 70 All 396 R H 3969982 3969984 3969986 3969988 0 633 BUSHING NOZZLE Piston Pin 67 70 All 3 53 5116181 6 85 pin bronze 1 O D x 67 70 All 3 53 5150140 3 45 NOZZLE piston spray 0 636 PIN Piston NOTE See Dealer Price Schedule P A 26 for applicable prices STD 015 0 S 003 0 S 005 O S 010 0 S Length 38 53 All 3701395 602319 3 6 54 63 All 235 3743024 3703686 3704881 3704882 3 6 62 63 All 261 3743023 3707495 3 Vaz 6 67 70 All 3 53 5116189 3 4 3 0 639 RETAINER Piston Pin 67 70 All 3 53 5180250 6 11 0 643 RING UNIT Piston Service Sets NOTE Individual cylinder piston ring units std size only for warranty replacement in a single engine cylinder may be ordered thru the local G M P D warehouse refer to ACNC6775 Identify by eng model and year Each of these std size piston ring units include the necessary components ring spacers segments expanders required for replacement in a SINGLE engine cyl NOTE See Dealer Price Schedule P A 26 for applicable prices Original Equipment Type complete set for one engine per container STD 020 0 S 030 0 S 040 0 S 53 63 All 235 3899496 3899498 1 62 63 All 261 3901747 3901748 3901749 1 55 57 All 265 3905309 1 57 70 All Blazer 230 250 283 307 64 65 All 153 3892385 3892388 3892392 1 63 70 All 292 3892372 3892373 3892374 1 64 66 All 194 66 All 153 3892355 3892356 3892357 1 68 69 All 396 3885028 3885029 3885030 1 67 70 All 3 53 5196833 3 65 70 All Blazer 327 350 38923640 3892365 3892366 1 70 All 396 3977626 3977627 3977628 1 Special Replacement Type complete set for one engine per container STD 020 0 S 030 0 S 040 0 S 38 53 All 216 3704008 1 50 53 All 235 3704030 1 54 63 All 235 3713002 3713003 3713004 3713005 1 62 63 All 261 3731676 3731681 3731685 3731689 1 55 57 All 265 3724998 1 57 70 All Blazer 230 250 283 307 63 65 All 153 3947057 3747549 3747558 3747567 1 65 67 All 327 3799438 3799448 3799458 1 63 70 All 292 3846206 3846207 3846208 3846209 1 64 G 10 194 3791626 3791610 3838345 1 NOTE 1 These are Molybdenus premium rings NOTE 2 These Ring Units contain Vez compression rings NOTE 3 Only half of the components in this unit are required for 4 cyl models three quarters are required for 6 cyl models NOTE 4 This Ring Set contains 1 top compression ring 3 compression rings 4 oil control rings half 2 expanders NOTE 5 Cromflex Ring Set having chrome plated oil rings top compression ring and chrome plated rail for middle compression ring Y 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORAT ON P A 31 0 629 0 643 0 18 REV 6 71