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Drill type 4 mains for piston squirters

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When you have a type 1 block or a type 4 block and you have it drilled for piston squirters, you MUST also have the type 4 mains drilled so the oil can leave the crank journal and GET TO the drilled openings in the block.
This is a fee that you'd pay the machine shop to drill those holes through the main bearings so they align up perfectly with the holes in the blocks main bearing saddles.
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