Re: Dart Big "M" 396 Sportsman block...
The 2 Dart M 396 blocks we did in 2013 were not siamese. They were 287# as received, 270# after all machine work. Stock block 396 filled w/ hardblock 230#. Stock block 427/ 454 208# add 8 sleeves 224#. Dart is heavier, will take the .075 overbore for 396 - 402 / ring seal is better - no brainer...
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Bub Whitaker
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