follows Dual spring valve with necked down or reduced diameter stem tip section use 3835333 seal and 838029 key dual spring valve w full diameter stem tip section use 3756314 seal and 3747310 key 59 Pass 283 3764389 8 SEAL inlet valve stem to guide oil 55 61 Pass 8 cyl 61 Pass H Per w reg Cam 348 61 Pass w Sp H Per 348 62 Pass 8 cyl exc 409 63 64 Pass exc 235 409 63 64 Pass 409 exc H Per dual 4BC 3836755 A R SHIELD cup shape VB l D x 1 O D 58 60 Pass 348 exc H Per Sp H Per 61 Pass 348 exc H Per w reg cam Sp H Per 3732891 16 SHIELD cup shape Wu l D x 1V2 O D 61 62 Pass 409 63 64 Pass w H Per dual 4BC 409 3795664 16 SHIELD valve stem oil cup shape V2 l D x 1 O D 0 309 CAP ROTATOR ASSY Valve Spring 38 47 Pass 839367 6 inlet w U key round double flange or round stmpd N 080 thick Note 1 47 52 Pass 53 62 Pass 6 cyl exc 1955 w P G 6 inlet and exhaust 55 Pass w P G 6 cyl 3835392 A R inlet only l z dia 080 thick Note 1 55 62 Pass 283 327 59 61 Pass w H Per 348 63 64 Pass exc 409 3729363 A R inlet and exhaust 1 6 O D stamped H Note 2 NOTE 2 Used with necked down stems Full dia stem on some models require cap 3776967 58 60 Pass 348 exc H Per Sp H Per 61 Pass 348 exc H Per w reg cam Sp H Per 3747309 A R inlet and exhaust 1 6 O D 60 61 Pass w Sp H Per 348 61 Pass H Per w reg cam 348 63 64 Pass 409 exc dual 4BC H Per 3776967 A R inlet and exhaust 1 O D N 61 64 Pass w H Per dual 4BC 409 3815520 16 inlet and exhaust 1 2 O D 41 55 Pass 6 cyl exc P G 3695373 6 ROTATOR ASSY exhaust valve Note 3 NOTE 3 For use w 45 degree valves only for preventing excessive heat generation on operations where this condition may be encountered NOTE 1 On 1941 47 models w two groove valve stems use 3835392 Cap 0 310 KEY CAP Valve Stem 38 64 Pass exc 348 409 58 61 Pass w dual valve springs 348 838029 A R U shape Note 1 NOTE 1 348 Hi Performance Engines having dual valve springs require O ring seals and valve stem keys as follows Dual spring valve with NECl ED DOWN or reduced diameter stem tip section use 3835333 seal and 838029 key dual spring valve w full dia stem tip section use 3756314 seal and 3747310 key 58 64 Pass 348 409 exc dual valve springs 3947880 32 green 54 Pass 3716742 12 CAP valve noise silencer 0 311 SEAT Valve Spring 38 49 Pass exc DC 54 55 Pass 235 exc P G 838539 12 inlet and exh V4 height overall 0 333 ARM Valve Rocker with Adjusting Screw and Nut 41 49 Pass 839459 3 exhaust L ldent No 839461 41 49 Pass 839460 3 exhaust R ldent No 839462 r 41 49 Pass 839463 3 inlet L ldent No 839465 41 49 Pass 839464 3 inlet R ldent No 839466 50 58 Pass 6 cyl 3837031 3 exhaust L ldent No 7 dab of blue paint ldent No 3837027 or 3764487 50 58 Pass 6 cyl 3837032 3 exhaust R ldent No 8 dab of blue paint ldent No 3837028 or 3764488 50 58 Pass 6 cyl 3837029 3 inlet L ldent No 5 dab of blue paint ldent No 3837025 or 3764485 50 58 Pass 6 cyl 3837030 3 inlet R ldent No 6 dab of blue paint ldent No 3837026 or 3764486 t 1970 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATlON P A 30 0 308 0 333 0 10