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Old 03-11-2007, 06:23 PM
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265 chevy cylinder heads ??

I recently got a set of chevy cylinder heads they are casting number 3748772HO they are also made in Canada and the date codes are 3-2-5 and 7-0-5 they are staggerd valve cover bolt holes what puzzels me is the HO casted into the casting number all of my books show the 3748772 as a 1958-1960 283 but do not mention the HO looking to see if anyone ever heard of this any info is greatly appreciated, Tom

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Old 03-11-2007, 07:19 PM
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My book, "Catalog of Chevy V-8 Engine Casting Numbers 1955-93" lists the casting number as being '58-'59 283 truck/passenger car.
The same book also says the staggered hole heads were used from '55-'59.

Last edited by johnnya; 03-11-2007 at 07:25 PM.
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