Why are my heads stamped "GOODYEAR"?

[b4black]

I know this is a weird question, but maybe somebody knows something. These are V6 heads, casting 8445, ported and 'big valves'. They were installed on a short block I bought in Chicago. Both heads are stamper GOODYEAR.

Any idea?

 

[Royal-T-Ltd]

I know this is a weird question, but maybe somebody knows something. These are V6 heads, casting 8445, ported and 'big valves'. They were installed on a short block I bought in Chicago. Both heads are stamper GOODYEAR.

Any idea?

View attachment 347346

Maybe that’s the previous owners last name? And machine shop stamps parts to keep track of them [emoji2375]


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[earlbrown]

Looks more like GOODY FAP