Guest Posted April 25, 2002 Share Posted April 25, 2002 I Have a 455 Olds Long Block, ran well when taken out. No accessories or Carb; It does have the distributor.<P>The casting number is 396021F, which I believe, puts it at a 68 to 72<P>Behind the flex plate it is casting F with a 68 below it. I am told the F with no number refers to a high nickel content block?<P>Thanks Jim<P>jim@lakepillsbury.com Link to comment Share on other sites More sharing options...
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