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You'll also note the huge bottom-end girdle, which came from TA Performance. This is standard fare on Buicks making over 600 horses, and keeps the two-bolt main bearings stable under pressure. The block oil passages have been enlarged from the primary feed port up to the cam/lifter galley. Also, the oil passage from the main galley manifold to the main bearings has been cleaned out and smoothed as much as possible to aid lubricant flow. View Related Article
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