Description

  • New design casting incorporating the best designs of Mark IV and Gen VI
  • Production-type cast-iron 4-bolt block
  • Improved main bearing bulkheads-Bowtie block-style bulkhead
  • Clearanced for bigger strokes
  • 4.470” finished bore
  • 4.600” max bore (siamese)
  • Fuel pump pad has been added/machined
  • New water jackets for use with Mark IV or Gen VI heads
  • Revised oiling to allow for bigger cam bearings/cam lift
  • Bolt boss (machined) added near distributor hole like 8.1L
  • Can be drilled for use with 10-bolt front timing cover
  • Additional clearance added for roller timing chains
  • Auxiliary oil pressure line added to front of block
  • Racing-style oil filter cast feature with added oil pressure port
  • Two bosses added for manual transmission clutch pivot (machined)
  • Additional material added around lifter bosses