1963 426 stgII max wedge
RubyRedSavoy knows what he is talking about regarding the stage question. 413 max wedge engines were not defined as stage I max wedges. All 1962 max wedge engines were simply 413 Maximum Performance Wedges. The 1963 426 max wedges up to 5/30/1963 (low compression) and 6/13/1963 (high compression) were just 426 maximum performance wedges. You can refer to them as a 426 stage I and be correct but Chrysler did not refer to them as stage I. The stage II engines were first built on 5/31/1963 (low compression) and 6/14/1963 (high Compression.
As for your description of the pad date, One Bad 440 is incorrect. From the beginning of the 413 max wedge engine builds up to December 18 1963, the date code was month-day-year in that order. Beginning December 19 1962 the date code was changed to month-day-number of engine built that day. So, 12-18-62 meant December 18th 1962, and 12-19-03 meant December-19th-03rd engine built that day. I have pictures of engines up to 14th engine built that day.
Chrysler bulletin number 63-1B states...
"In order to provide individual identification of Super Stock 426 (Plymouth) engines, a two (2) digit "sequential number" will be used in place of the year built stamp. Each day the number will begin with 01 and run through the total number of engines built that day. In effect the month, day and sequence number becomes a serial number. This new identification system was incorporated in production beginning with engine number 12-19-01."
Block casting date,
Block pad stamp,
Let me define the stamping, the first number is the year the second the day and the third the month. 3=63, 16=16th day,08=8th month august.
Carb stamp,
RubyRedSavoy knows what he is talking about regarding the stage question. 413 max wedge engines were not defined as stage I max wedges. All 1962 max wedge engines were simply 413 Maximum Performance Wedges. The 1963 426 max wedges up to 5/30/1963 (low compression) and 6/13/1963 (high compression) were just 426 maximum performance wedges. You can refer to them as a 426 stage I and be correct but Chrysler did not refer to them as stage I. The stage II engines were first built on 5/31/1963 (low compression) and 6/14/1963 (high Compression.
As for your description of the pad date, One Bad 440 is incorrect. From the beginning of the 413 max wedge engine builds up to December 18 1963, the date code was month-day-year in that order. Beginning December 19 1962 the date code was changed to month-day-number of engine built that day. So, 12-18-62 meant December 18th 1962, and 12-19-03 meant December-19th-03rd engine built that day. I have pictures of engines up to 14th engine built that day.
Chrysler bulletin number 63-1B states...
"In order to provide individual identification of Super Stock 426 (Plymouth) engines, a two (2) digit "sequential number" will be used in place of the year built stamp. Each day the number will begin with 01 and run through the total number of engines built that day. In effect the month, day and sequence number becomes a serial number. This new identification system was incorporated in production beginning with engine number 12-19-01."
