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Re: What engine?
Hi welcome I have the same numbers on the back...
350-010 blocks
some feel it containing more "nickel"content,makes the block stronger
some find 2 or 4 bolt mains are possible
the "orange" block finished up in 78,but some are blue
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John
1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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