With deck heights of up to 9.800" and 10.200" and bore sizes of up to 4.310", the Dart Gen V and VI style block gives you the versatility to build a wide variety of engine combinations. A true priority main system oils the main bearings before the lifters for added reliability. The block is fitted with 4 bolt main caps for bottom end strength.

Features:
- Standard 9.800" and tall 102.00" deck heights available.

- Standard 4.250" bore size can be taken up to 4.600" on request.

- Uses +.300" tall Gen VI style lifters. Modification for MRK IV style available.

- Siamesed bores for additional strength.

- True priority main oiling lubricates the main bearings before the lifters. Our stepped main oil gallery (9/16" to 1/2" to 7/16") increases the flow of oil to the crank at high rpm, and our front oil crossover eliminates internal oil leaks around the distributor shaft.

- Oil filter pad is drilled and tapped for an external oil pump.

- Lifter valley head stud bosses prevent blown head gaskets.

- Mechanical fuel pump boss, clutch linkage mounts, and side and front motor mounts simplify installation in any chassis.

- 4 bolt main bearing caps in ductile iron have splayed outer bolts for extra strength.

- MRK IV blocks use the 2 piece rear seal design, while Gen V and Gen VI blocks use a 1 piece seal and a different timing cover pattern.

- Coated cam bearings, freeze plugs and dowel pins are included.

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!