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MC foundry stamp, stands for "Mocasco" (Motor Casting Company), in Milwaukee, they are still in business... They did all the cast alloy, cast iron and cast steel for Harley, probably still do a bit now...

Patrick
 

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MC foundry stamp, stands for "Mocasco" (Motor Casting Company), in Milwaukee, they are still in business... They did all the cast alloy, cast iron and cast steel for Harley, probably still do a bit now...

Patrick
Thanks for the info, I was close, but not 100% sure.
 

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Same stamp as on my Dytch cylinders. So you may have a big bore, Dytch cylinder. You would need to check the bore to know. Dytch is know known as Axtell Industries, but they don't make them anymore, unless I am ill informed. I would check the stroke, to see if it is longer than stock, and if so, you may have a Dytch stroker. They were more common in the late 50's and 60's. But they still show up from time to time.
 
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