costpenn

Was reading the 71 W-30 thread, and remembered I had taken some pics of some markings I found on the underside of my hood. Are these typical? I can't figure out how to read a date into it - it looks like 509 X to me. My car was built 4th week Jan 70.

vette442

My factory OAI hood on my Fremont built '72 442 has similar markings on a front corner, but it's an actual date format - 5-17-72, I think it is.

Terry

costpenn

Is there a thread already dedicated to this subject? I can't find anything through the search function on the topic.

w30rocketdr

Have two 70's with same markings on rear of hood, passenger side. My "121" "X" matches production "A" build sheet line # on top row A. No other ties to broadcast card found in body. PM me and I will forward pics of sheet and factory markings.

lunaboy

my 70 442 oai hood under the screen in the center has a 62 then under the 62 is
4-15-2 and under that is 16 . i will have to chk my build sheet. i will be painting the underside and would like to duplicate these markings.

paulolds

I have heard two versions of why these markings are there. One is date confirming antifreeze check, which should relate to build date. Second is last three digits of sequence number to let line workers see which job number is coming next. The placement of next to hinge area though would make it hard to read at any distance.

Paul

BlackGold

If the markings were factory-installed, this makes sense. But it's of course possible for ANY service technician in the past 40+ years to have made his own mark for whatever reason. When I went to change the air filter in my daily driver several months ago, thinking it was 2-3 years old, I was pleased to find that just six months earlier a service tech had changed the filter -- and used a sharpie to write the date and mileage directly on the filter.

MRSDOC

Those are 1970 factory markings found on both 70's we own. Tied numbers to line number on left hand upper corner, 1st line. Both have almost exact same font. Will attach pics of both under hood markings and sheet.

costpenn

Wow! Thanks for the response. Your original marking does look like mine with the X on the end. What does the line number signify? I have the broadcast card for mine, but not that sheet that you show in your picture. 509 seems like a pretty large number for the day's production sequence as opposed to your 121.

Rocketbrian

I was wondering the same thing about the markings on my 71 442, non OAI. I found what appears to be 467 x 2 near the drivers hinge area of the hood. I didn't know it's significance until I found the same 467 on the top of the lower dash section. So, I presumed it must be a sequence number. However, although I have the small assembly card that I found under the carpet, the top left corner is ineligible. I am still wondering what the X and the 2 mean. Any ideas?

BlackGold

The Lansing plant was cranking out about 100 cars an hour back in the early 70s, so 509 is nothing.