Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

You may be correct for a 70 Chevelle but not for a 67-69 Camaro.. <span style="font-weight: bold">IF</span> they had an &quot;I&quot; then you wouldnt have a &quot;M&quot; date code for Dec..

https://www.yenko.net/ubbthreads/pics...4-img_3365.jpg

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

http://www.nastyz28.com/forum/archiv.../t-100578.html

#186 heads HAVE M dates , and the letter I WAS used in cylinder head castings

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

Are we talking radiators or cylinder heads..??.. Lets keep it on one subject so it doesn't get confusing.

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

Well you pointed out that since the letter M was used in a radiator, that the letter I couldnt be possible as there would be 13 letter months in a year . I just gave an example of a part having I and M usage. And Ive already stated I have had 2 I date radiators. 70 radiators also have M dates.

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

So where is the 13th month? 32nd of Nevermber? This is not as cut and dry as some might think. Do we have any witnessed &quot;I&quot; radiators for a Camaro? Also this discussion probably needs to move from this thread into its own.

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

I originally posted to try and help Tony sell his radiator. I will keep my findings to myself from this point forward. Sometimes it takes more than google search to find answers to alot of technical questions.

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

I removed my comment. If he wants to have this conversation privately he can pm me.

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

Guys, please lock this thread...radiator has been sold.

Re: 1969 Z/28 Original Radiator w/ 'UH' Tag
 

Not pertinent to the rad question, but M-coded heads denotes a foundry evaluation piece, rather than a casting date code; similar to the M-code block castings described in the CRG drivetrain decode section. I have a pair of 'M' 186 heads on my Camaro.