ID/              Use         Casting
Code  Year(s)    CID   CCs   Number   Notes
 1    '64        330         385101   Used ROCKER SHAFTS rather than
                                      pairs on PEDESTALS.
 2    '65        330         ??????   All V-8s now using PEDESTALS.
 3    '66        330   60    389394
 4    '67        330   60    394497
 5    '68 - '69  350   64    397742   Excellent candidate for use today.
                                      Good flowing, and high compression.
 6    '70        350   64    403859   W-31's had larger 2.000 intakes. '69
                                      W-31's?
 7    '71        350   64    409147   W-31's had larger [2.000] valves.
 7A   '72        350   64    409147   The 'A' is a subscript, like �"
                                      tall, to lower right of the '7',
                                      like | 7A.
 8    '73 - '76  350   79    411929   Smog heads. Have huge bb-sized 79cc
                                      chambers yielding poor compression
                                      ratios without extremes of
                                      compensation.
 10   '76, '77?  260?  57    550362
 2A   '76 - '81  260         554715   Easy way to ID a 260 engine.
 3A   '77 - '80  350   75    554716   1/2" bolt holes.
 4A   '77 - '79  403   83    554717   Matches the 4A or 4B block, get it?
                                      Easy way to ID a 403. 1/2" bolt holes.
 5A   '80 - '84  307   64    3317
      '85 also???
 6A   '85 - ??   307   67    5844     Non-ECM Canadian cars?
 7A   '85 - '90  307   67    0142     This 'A', and the others from 2A to
                                      6A, is a large capital letter equal
                                      in size to, and immediately adjacent
                                      to the 7, like | 7A.
 D3A             350         3948     Diesel.