I recently sold the last 4 original assembly line shrouds I had,over the last 2 years,all in various conditions.
The part #3938165 is embossed into it.
They don't reproduce this Big Block 3 core shroud properly.They only sell the later issued 3rd design for 4 core radiators,with an entirely different part,#6261914.
Read & see details here.
https://www.yenko.net/ubbthreads/ubbt..._70_Chevelle_C