TO USE OR NOT TO USE THE LETTER "i"
I know this has been beaten to death on this and other forums, and reading books about it makes my head spin, but I still have not found a definitive convention to use when determining the date of either a cast or stamped part. I have read no less than 100-150 threads in doing research that either directly address or peripherally address this issue of when to use the letter "i" in determing date of manufacture or assembly.
Let me preface this by citing an example or two that caused me confusion.
1. https://www.forums.ncrs.org/showthre...=m292&uid=7420
This thread talks about a 1963 master cylinder with a casting of "M 29 2" which all agree on that particular thread is a December 29, 1962 casting date. Skipping the "i".
2. https://www.forums.ncrs.org/showthre...=k214&uid=8824
In this thread toward the end, they speak of heads and blocks with casting dates of K 21 4 and K 17 4 describing them as November 21 and 17, 1964 casting dates. In this case clearly using the "i".
I have mostly read throughout this forum the convention in threads by some of whom I have observed to be "expert" in details about these old cars (Jack Humphrey (17100) and John Hinckley (29964) for example, who both agreee that in general say, "If the part is stamped, like an alternator, voltage regulator, radiator, etc, then you don't count the "i" in determining date. In this case "M" is December. For cast parts like the block, heads, transmissions,etc, you count the "i" in determining the date. So in that case an L 28 2 casting date would be a December 28, 1962 part. "L" is December.
There seems to be some discrepancy between the two threads I've cited, and I have seen some confusion among other threads about this topic but have not posted here.
So using this "logic", my block a 3782870 casting (driver's side) with a J 9 2 date (no casting clock) on the passenger side would be an October 9, 1962 casting date. Am I on the right track here and is the convention I've cited above fairly well accepted for determining dates of cast date vs. stamped date parts?
Let me preface this by citing an example or two that caused me confusion.
1. https://www.forums.ncrs.org/showthre...=m292&uid=7420
This thread talks about a 1963 master cylinder with a casting of "M 29 2" which all agree on that particular thread is a December 29, 1962 casting date. Skipping the "i".
2. https://www.forums.ncrs.org/showthre...=k214&uid=8824
In this thread toward the end, they speak of heads and blocks with casting dates of K 21 4 and K 17 4 describing them as November 21 and 17, 1964 casting dates. In this case clearly using the "i".
I have mostly read throughout this forum the convention in threads by some of whom I have observed to be "expert" in details about these old cars (Jack Humphrey (17100) and John Hinckley (29964) for example, who both agreee that in general say, "If the part is stamped, like an alternator, voltage regulator, radiator, etc, then you don't count the "i" in determining date. In this case "M" is December. For cast parts like the block, heads, transmissions,etc, you count the "i" in determining the date. So in that case an L 28 2 casting date would be a December 28, 1962 part. "L" is December.
There seems to be some discrepancy between the two threads I've cited, and I have seen some confusion among other threads about this topic but have not posted here.
So using this "logic", my block a 3782870 casting (driver's side) with a J 9 2 date (no casting clock) on the passenger side would be an October 9, 1962 casting date. Am I on the right track here and is the convention I've cited above fairly well accepted for determining dates of cast date vs. stamped date parts?
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