rearview Posted April 23, 2015 Share Posted April 23, 2015 258 crank going in an in 87 block should have the same the same nose and pilot bushing hole size as the 4.0? Link to comment Share on other sites More sharing options...
Megadan Posted April 23, 2015 Share Posted April 23, 2015 From what I understand, it depends on the year of the crank you are using. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted April 23, 2015 Share Posted April 23, 2015 A serpentine 258 crank will have the same snout , a v belt 258 will need a spacer for the harmonic balancer . As far as the pilot hole I believe them to be the same , I went with an auto trans and the torque converter fit with no issues . I have a extra 4.0 crank and another new stroker out in the garage I can measure with a caliper when I get home. Link to comment Share on other sites More sharing options...
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