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Hi,

I am attempting to identify the correct application for these pistons shown in the attachment pictures. We have been told the piston with the valve clearance in it is for a Pontiac 389. We are attempting to find out what the other 3 are for. They have the same diameter, skirt height, and internal design. They have the GM and 532007 cast into them.

Any assistance would be greatly appreciated.
 

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