big m gen v, gen vi, gen 7 (8.1 liter), non-siamese big block chevy iron engine block,10.236,4.250,standard,standard,standard,ductile

Dart is committed to producing the best engine components available, including the Dart Big M Mark IV big block Chevy full water cast iron bare blocks--engineered for applications where water between the bores is a requirement. Siamese bore versions are also available for larger bore applications.