These Dart/PBM Block and Rotating Assemblies offer race proven quality components at a greatly reduced package price. Dart Little M sportsman blocks, forged 4340 crankshafts, H-beam rods, forged pistons and file fit rings are standard in these popular combinations.- 421 cubic inch
- 4.155 bore x 3.875 stroke
- Dart Little M Sportsman Block - 9.025 deck
- 4340 Forged Crankshaft - 350 or 400 mains
- 6.000 in H-beam rods
- JE Forged Pistons - Domed
- Comp ratio 58cc=14.2, 64cc= 13.2, 76cc=11.1 to 1
- File Fit plasma moly rings
- Coated & grooved cam bearings
- Clevite H Series rod & main bearings
- Brass freeze plugs & steel cam plug
- Cam lock plate and bolts
Other Combinations Available - Custom Assemblies our Specialty - Please Inquire Hundreds of stroke & bore combinations available |
