73 340 engine build date

[Alaskan_TA]

Yep, I got them.

I just learned somthing new also, the date system changed starting with the 1972 model year;

http://www.hamtramck-historical.com/images/TSBs/1972/25-01-72C%20page_6.jpg

So, instead of the 10,000 day calendar like older engines, it is Month / Day.

For your engine the 0606 would be a final assembly date of June 6, 1973 if I got that right.

[Alaskan_TA]

OK, another example, I have a 1973 340 here I just looked at, it says;


?W 340 R 4137 8126 (first digit is not readable, but it has a 1973 VIN)

The 4137 is the 10,000 day calendar date code for Nov. 24, 1972 (1973 model year)

So it appears that both types of date coding were used.   

[vinb]

Ya,  really 

[Alaskan_TA]

Another one with over 8000 as a build number too. The "8" must mean something else?

My head hurts.

[Aussie Challenger]

   With regard to the lag between cast dates and build dates, didn't they leave the castings for awhile to stress relieve them especially the high performance versions