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Casting marks
Posted by: JerryM ()
Date: June 12, 2019 08:23AM

Are casting marks, for example "GM 27" or "GM 1" and so on, indicating a tooling master or particular foundry or ?

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Re: Casting marks
Posted by: Ed Dowds ()
Date: June 13, 2019 04:21PM

Sometimes casting marks like those define which form was used to cast the part.
They may have started with #1 and when that wore out they went to #2 then #3 and so on.

Ed
Hillsborough, NJ
66 500 rear 4.3 V6 Corvair
69 350/350 TH Camaro was RS
30 Model A Ford Streetrod 350/400 TH
88 Celebrity Wagon (Daily Driver)

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