Bearing help

Old 03-26-2011, 09:58 PM
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Join Date: Mar 2003
Posts: 18
Default Bearing help

Cleaning out the shop and came upon a box of main bearings..they are of box was marked 400sb ..but the end says ms829p BBC? I looked at the bearings and they are:5203 upper and 5202 lower. Rear main numbers are:6431 and 6432..the box says michigan 77 made in england...what the heck are these? Thanks!
sprint3 is offline  
Old 03-27-2011, 07:40 AM
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Default bearing

BBC "P" production main bearings. Same as Clevitte bacically. Good for stock, mild performance rebuild. "H" is for high performance.

Tape them together in a circle and measure ID. Should be 2.750" approx.

SBC 400 is MS-1038. ID is 2.650" approx.
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