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I have 8 pistons with the Ford logo and this serial # D1ZX-6110-AB. They look HI- performance, and are hi-compession.
Does anybody know if they are Boss??
Some people told me they are.
 

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Well, the D1ZX means they are 1971 pistons and they are probably for the Boss 351 motor and not the Boss 302. They could be service replacements for the B302 on an outside chance. If you check the compression height ( the center of the pin to the top of the piston) and they measure approx 1.360, they are B302's, if they measure approx 1.638, they are B351's.
 
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