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Dovetail Bearing

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8. You can buy crankshaft kits from many sources if you can't find a used one to recondition yourself. Unless you have an '87-'90 (non-H.O. block), however, don't buy a 258 crank kit because the main bearings will be incorrect for the '91-and-later blocks. The 4.0L blocks use a bearing with the dovetail (see arrow) centered in the saddle. The 258 and early 4.0L have the dovetail offset.