Ducar Replacement 70MM Bore Engine Block Build your own engine starting with a solid foundation. The Ducar 70MM block is not the average mass produced block! Ducar holds these blocks to higher tolerances and better casting methods are used. This block accepts the common GX200/Clone or Predator 212 parts (Predator 212 Non-Hemi camshaft will not fit this block) This is a standard deck height block that is .020" shorter than the Predator 224 block. Use the appropriate connecting rod to build your 224!