Earliest 426 HEMI Casting

Discussion of the 426 Street / Strip HEMIs.

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Earliest 426 HEMI Casting

Post by scottm » Wed Sep 16, 2009 11:30 am

Does anyone know of an earlier 426 HEMI casting than 10-17-63 ?

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Re: Earliest 426 HEMI Casting

Post by hemicar1971 » Tue May 04, 2010 5:00 pm

That sure is an early casting date on the block. I have seen earlier casting number on other hemi parts for the 1964 hemi build as early as August. I was under the impression that these early block were prone to failure. The Nascar stories say that the blocks failed under testing at around 400 miles so they would not last in a 500 miles Nascar Race. I believe Chrysler recast the block for the Daytona 500 from Feb. 10 to 13 1964 and these block were used in the race.These new block were heavy wall poured blocks.

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Re: Earliest 426 HEMI Casting

Post by bshemi » Sun Aug 29, 2010 10:02 pm

I have a 64 hemi crossram part no. manifold with a 6-23-63 date. any other early date parts out there?

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