Who is knowledgeable on 8-3/4" casting date codes??? This is my 69 340 Cuda 3rd member. Pretty sure it is not original, but date code is not completely legible.
Thx
Jim
Thx
Jim
Date code??
- Thread starter RealWing
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I asked the same question 3 years ago and posted numerous photos from ebay. No rhyme or reason.
Need help with date codes 742 - 8 3/4 center section
Need help with date codes 742 - 8 3/4 center section
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J21 is the date code. J for September and 21 for the day. It's an early (up to 1968) axle. From 1969 they had a four numbers system.
They still used the 741 rear in 1969. Not sure about the date info though. Maybe J 21 is late 1968 which would be for early 69 model year?
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Sorry, I don't know definitive dates but when crossover changes happen (from model year to model year) unless it's some sort of government mandate like the headrests in Jan. 1969 I'm sure there's some carryover of leftover parts.
The spd for the car was Dec 30 1968 so J21 (Sept 21st) seems to fit
So if J 21 is september 21 there is nothing there to give you a year. So it could be september 21 of 1964 to 1972.
Assuming they started a 4 digit date code from 69 on it could be a 64 to 68 housing.
Assuming they started a 4 digit date code from 69 on it could be a 64 to 68 housing.
As the OP stated, SPD is Dec 1968. That makes the car a 1969. The original motor would have a 1968 date so J 21 being Sept. 1968 makes sense. Just because they started 4 digit dates in 1969 does not on it's face mean that 1969 Model Year parts were only made in 1969.
Engine is original and dated in late 1968.
My '69 cuda's SPD is Feb 26, (1969). The original engine casting date is 12/10/68.
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