Main bearing kit, .020 inch, with flanged thrust bearings. Bearing locating tabs placed off-center top half, centered lower half. Replaces 1 - AR77747, 1 - AR77751, & 4 - AR74817. 1 kit used in 254 CID 4 cylinder diesel engine (block #'s R40910, R46350, R46430 only), 270 CID 4 cylinder diesel engine.
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