Dart has developed a new world of performance for metric 8.1 big block engines. The Gen 7 block has full water jackets between the cylinder bores and has been improved with strengthened design and priority main oiling.

Features:
- Premium iron alloy.

- Priority main oiling for improved reliability.

- Head bolts and other fasteners are metric for compatibility with stock components.

- Uses standard big block Chevy main bearings and rod bearings.

- 10.236" deck height.

- 4.250 cylinder bore.

- Ductile iron main caps.

Block Prep Options
Dart blocks are optionally available fully finish prepped. If you choose to order your block this way you can specify a final lifter spec and a final hone spec. Your block will be finish machined to your specs, final prepped and washed, pipe plugs and freeze plugs will be installed, then it will be bagged and boxed. Your block will arrive finished and ready to use!