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LT1 backing plate....which side is which

Old 03-15-2007, 12:22 AM
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Default LT1 backing plate....which side is which

Just bought a set of LT1 backing plates to go on my moser 9" housing since the first set I bought off ebay obviously weren't LT1 plates since they wouldn't fit the housing ends. Now that I have the proper backing plates, can anyone tell me which stamping number goes on which side?
Old 03-15-2007, 07:46 PM
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I looked online and those numbers don't match anything from GM

Last edited by xpndbl3; 03-17-2007 at 01:20 AM.
Old 03-17-2007, 12:37 AM
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looks like 8858 on both brackets along with 050(WN2) on one and 063(WN1) on another. Any thoughts...i'm 50/50 on picking the proper one
Old 03-17-2007, 07:38 PM
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they're suppose to be the same left and right, the LS1 backing plates are side specific
Old 03-18-2007, 01:13 AM
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the holes are clearly offset slightly from bracket to bracket, I compared these to pics online of LS1 brackets and they're definately LT1 brackets.


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