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Build date/Engine date

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Old Sep 13, 2006 | 01:08 PM
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Default Build date/Engine date

What the max difference between the production date on the trim tag and the date that is stamped on the engine? For example, if the trim tag says the car was produced on Oct 11th, would an engine built on Sept 9th be correct? Thanks! (1965 Coupe)
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Old Sep 13, 2006 | 01:11 PM
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From what I have read / what I have heard - typically it is acceptable to have the engine build date up to 6 months prior to the car. Desired is 4 to 6+ weeks.
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Old Sep 13, 2006 | 01:59 PM
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This is my understanding of how things worked before "just on time delivery". Cars where built in lots of 500. All the parts were ordered for these 500 cars. Parts come in and were storied at Saint Louis. Now 23,562 cars where built in 1965 that is approximately 73 cars a day.

Now the question is how long was that motor in storage. If more motors where brought in and taken before this one; it could be possible.

But the real question is "what does the pad look like?"

Seems that if someone was going to restamp a motor they would make the date closer.

Also something to consider is they made more cars at the beginning of the model year than later.

Just my .02

P.S. I hope this is not a big block. They did not come out till later.
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Old Sep 13, 2006 | 02:10 PM
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Originally Posted by knight37128
This is my understanding of how things worked before "just on time delivery". Cars where built in lots of 500. All the parts were ordered for these 500 cars. Parts come in and were storied at Saint Louis. Now 23,562 cars where built in 1965 that is approximately 73 cars a day.

Now the question is how long was that motor in storage. If more motors where brought in and taken before this one; it could be possible.

But the real question is "what does the pad look like?"

Seems that if someone was going to restamp a motor they would make the date closer.

Also something to consider is they made more cars at the beginning of the model year than later.

Just my .02

P.S. I hope this is not a big block. They did not come out till later.
Small Block 327/350, thanks for the reply!
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Old Sep 13, 2006 | 02:14 PM
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Originally Posted by Dicecal
What the max difference between the production date on the trim tag and the date that is stamped on the engine? For example, if the trim tag says the car was produced on Oct 11th, would an engine built on Sept 9th be correct? Thanks! (1965 Coupe)
From an NCRS judging perspective, you're allowed up to six months prior to the car's final assembly date for the block casting date, and (obviously) the stamped engine assembly date must be later than the block casting date. "Typically", the casting date was 2-6 weeks prior to the car's assembly date, and the stamped engine assembly date would be no closer than a week prior to the car's assembly date. A September 9th-assembled engine would work fine with an October 11th-built car.
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Old Sep 13, 2006 | 02:24 PM
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Originally Posted by Dicecal
What the max difference between the production date on the trim tag and the date that is stamped on the engine? For example, if the trim tag says the car was produced on Oct 11th, would an engine built on Sept 9th be correct? Thanks! (1965 Coupe)
As for body built dates from Trim-tags, it makes a difference whether you have an AO Smith bodied car or a St Louis bodied car.

Both the engine assembly date, and the body built date, relate to the final (rolling off the assembly line) birthday of the car, and thus they do relate to each other, but are not absolutely dependent on each other - body can be built and engine can be assembled simultaneously.

case in point: my 65 Corvette has an engine with an 0329 assembly date, and an "H29" date on the trim tag (March 29th), and it's an AO Smith body.
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