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- Center Main Accepts Upper/Lower Crankshaft Thrust Bearing Inserts
- Machined/Delivered w/Cyl. Bore Semi-Finished at 3.228-3.226 Dia.
- Standard 7.800 in. Deck Height w/Extra Material For Decking
- Select Areas Around Main Bearing Webs Strengthened
- Lower Clutch Housing Bolt Bosses Reinforced
- Block Case from 40000 PSI Gray Iron
- Lifter Bore Dia. 0.5155-0.5145 in.