I just took off the side panels and discovered the casting 3733949.
The casting that I could read so far are the following:
On the top is the vintage 1950's Chevrolet script emblem.
Driver side:
3836848 (Head)
GM 1
-----------
GM 16
3835637 (?) Hard to read.
Passenger side:
CON 2 F 6 8
GM 16
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3733949 (Appears at the end at the bottom).
