The following chart shows the Service Type Piston Ring sizes to use in various oversize bores Special Cyl O S Use Ring Size Fitting Std to 009 Std None 010 to 029 020 File fit under 020 030 to 039 030 None 040 to 049 040 None 0 646 CRANKSHAFT with Dowel Pins 40 41 ALL w 216 forged 839111 839110 1 71 00 41 ALL w 235 forged 3660435 3660473 1 45 50 42 47 ALL w 216 forged 839775 839774 1 74 25 42 47 ALL w 235 forged 839750 839749 1 74 25 48 53 ALL w 216 exc P G forged 3835271 3835270 1 74 25 48 53 ALL w 235 exc P G 50 52 PASS w P G forged 3701894 3701893t 1 74 25 53 PASS CORV w P G 54 57 ALL CORV 6 cyl P forged on No 5 arm 3701486T 1 85 50 54 56 ALL 6 cyl P forged on No 5 arm 3701486T 1 85 50 55 56 ALL CORV 8 cyl forged 3836266 37048401 1 85 50 57 PASS CORV 8 cyl exc A T 57 Ser 3 4 6 8 cyl 3742332 1 81 50 57 PASS CORV 8 cyl w A T 3742333 1 81 50 INOTE When using on P G remove pilot bearing before installing tNOTE When used on Powerglide it will be necessary to remove the pilot bearing On models prior to 1953 Balancer 3701930 must be used 0 648 SLINGER Crankshaft Oil 55 57 ALL CORV 8 cyl 1 1 D x 3 O D x width 3704116 1 10 0 649 BEARING Crankshaft Clutch Pilot 31 39 ALL exc CC DC ND 7109 907109 1 2 35 NOTE 907109 used on 1939 jobs only with crankshaft 838345 33 34 CC DC 39 57 ALL CORV exc P G bush type 1 I D x 1E O D x 412562T 1 60 TNOTE Stop spring must not be used with 412562 Bearing 0 650 RETAINER Crankshaft Clutch Pilot Bearing 33 34 CC DC 39 46 ALL I D x 1 O D 836713 1 07 0 659 BALANCER PULLEY Crankshaft 37 40 ALL cast 838863 2 width thru l1ub 6 dia 603447 1 10 00 41 52 ALL w 216 cast 838863 3 width thru hub 6 53 1 TON w 216 dia 605203 1 10 00 41 52 ALL w 235 53 55 UTIL w 235 261 lst Ser weight 7 O D pul1ey V 3701930 1 10 00 53 SDL COMM exc D D weight 6 O D pulley V 3704339 1 10 00 53 PASS D D exc SDL P S 53 55 CORV 6 cyl 54 PASS exc P S 54 55 COMM lst Ser weight 7 O D pul1ey V 3704338 1 10 00 53 54 ALL P S double pulley 3705099 1 10 00 55 57 PASS 6 cyl exc C A C 3729416T 1 10 00 55 57 PASS 8 cyl exc C A C dual 4BC T G 57 CORV w 4BC cast 3836196 pulley V 3711319 1 10 00 55 56 PASS 8 cyl w C A C double pu1ley weight 61 O D 3719629 1 10 80 55 57 COMM UTIL 6 cyl 2nd Ser stamped T 3729417T 1 10 00 55 57 Ser 3 4 8 cyl 56 57 PASS CORV w dual 4BC exc T G cast 3836196 pulley V 3712763t 1 10 00 55 56 CORV w 4BC 3717206 1 10 00 56 57 PASS 6 cyl w C A C double pulley dia 3737510 1 14 85 0 s4s 0 css 146