Mains - 400
Deck Height (in) - 9.025 in.
Cylinder Bore as Shipped - 4.125 in.
Maximum Cylinder Bore Diameter - 4.185 in.
Engine Block Material - Cast iron
Main Bolt Style - 4-bolt
- Extra thick cylinder walls resist cracking and improve ring seal for more power.
- Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures.
- Priority main oiling system directs oil to the main bearings first for more dependable lubrication.
- Blind tapped head bolt holes prevent water leaks.
- Extra thick decks ensure reliable head gasket seal.
- Standard small block deck height allows use of off the shelf parts.
- Splayed outer bolts on middle main bearing caps prevent cracks.
- Open lifter valley improves return to oil pan.
- Enlarged lifter bosses accommodate offset and oversize lifters.
- 4 bolt billet steel main caps have splayed outer bolts for extra strength.
- Front and rear external oil inlets, crossovers and restrictor provisions to simplify plumbing with external pump.
- Block includes special coated cam bearings, freeze plugs and dowels.
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