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Thread: 428 with X
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post #4 of (permalink) Old 01-17-13, 04:36 AM
FFR428
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Join Date: Sep 2005
Location: USA
Posts: 321
Re: 428 with X

I don't think that's a service block and here's why....... 66 was the first year for the 428. The date code on your block is 5J14 which is 65-Sept-14th. As 66 production started in July-Aug 65 I'd say it's a pretty early 428 block.
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