Ford Big Block 521 Head: Kaase SCJ M6049 Bore: 4.390
- Bore: 4.390"
- Stroke: 4.300"
- Rod Length: 6.800"
- Compression Height: 1.350"
- Dome Height: -0.209"
- Dome/Dish Volume: -38.0cc
- Reference Chamber: 75.0cc
- Catalog Compression Ratio: 9.40:1
- Piston Weight: 575g
- Resulting Displacement: 521 cid
