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Old 06-21-2013, 09:47 AM
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can any of you help me identify these main bearings sbc 350

Can anyone help me identify them so I can get a proper replacement
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Old 06-21-2013, 05:48 PM
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Stock GM factory assembled bearing A-200 is the old Delco-Morraine bearing material. No over or undersize stated. Std size.. Clevite, Mahle, ACL, use rod bearing no 663 and.... my brain just went dead ...909 main bearings. P-series is tri-metal. A-is an aluminum type bearing. H-or HN is a race bearing.
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Old 06-21-2013, 07:52 PM
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Originally Posted by BOBCRMAN@aol.com View Post
Stock GM factory assembled bearing A-200 is the old Delco-Morraine bearing material. No over or undersize stated. Std size.. Clevite, Mahle, ACL, use rod bearing no 663 and.... my brain just went dead ...909 main bearings. P-series is tri-metal. A-is an aluminum type bearing. H-or HN is a race bearing.
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Old 06-21-2013, 09:12 PM
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The factory often used various incrementally under- and oversize bearings selected to fit a production line crank.

You will note the bearing on the right is 5 tenths (0.0005") oversize.

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