Build Date VS Casting Date
Thread Starter
Burning Brakes
Joined: Oct 2006
Posts: 1,089
Likes: 43
From: Native Californian CALIFORNIA
Army
Build Date VS Casting Date
What is an acceptable lag in time between the casting date and assembly date of a vehicle.
For and example a 1969 vette bulit mid-February and has heads coded 3927186 with a casting date of L 06 8 = December 6, 1968.
For and example a 1969 vette bulit mid-February and has heads coded 3927186 with a casting date of L 06 8 = December 6, 1968.
Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,500
From: Little Rock AR
For a judged competition you will probably get full credit if the parts are within 6 months previous to the build date. You can't cast it after it was assembled. 
Actual casting dates for known originals with the more popular engine combos are pretty close to the vehicle/engine assy date but that isn't what they are looking for on the judging field. The more rare the engine combo is, the greater chance for a wider date split.
-Mark.
Actual casting dates for known originals with the more popular engine combos are pretty close to the vehicle/engine assy date but that isn't what they are looking for on the judging field. The more rare the engine combo is, the greater chance for a wider date split.
-Mark.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
I would say your castings are good. I think NCRS guidlines allow 6 months variance. But less than 3 months would seem to be very close to production date to me for heads knowing the amount of machining/assembly involved.
Team Owner
Joined: Jun 2000
Posts: 38,923
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From: Southbound
Cruise-In II Veteran
Originally Posted by Solid LT1
I would say your castings are good. I think NCRS guidlines allow 6 months variance....
No problems with your casting dates. The closer you can get to the time/build date of your '69, the better off you are.
As an example, the time/build date on my '68 is I20 (April 20th). The block was cast at the beginning of April and assembeld on April 9th. One head is dated early April, the other is dated the end of March. Intake manifold is dated April.
The engine was shipped from Flint after 4/9/68 and arrived in St. Louis in time to be installed on 4/20/68.
