The Lotus block features an all new grey iron casting that is stronger than the original and accepts the Lotus cylinder head. 

• Standard 7.800" deck height with extra material for decking
• Machined and delivered with cylinder bores semi-finished at 3.228 - 3.226" (81.99 - 81.94mm) diameters
• Block is designed for standard bore engine builds
• Lifter bore diameter: .5155" - .5145"
• Block cast from 40,000 PSI grey iron
• Lower clutch housing bolt bosses reinforced
• Select areas around main bearing webs strengthened
• Center main will accept upper and lower crankshaft thrust bearing inserts
• Includes cam bearings (Installed)