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#1
11-06-2008, 11:26 AM
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Used those pistons - with the "bumps" milled off and domes polished - in my '75 T/A w/ a 455SD engine MANY years back. I knew a LOT less back then than I do now, but it ran OK. Upper 11's @ 112 with a TH400 and 4.10's.
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Regards, "455HO" Lloyd 2008 GMC Sierra Denali 2WD Crew, L92 6L80E, Silver w/ Ebony guts, 14.26 @ 98 
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