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Forum: Pontiac - Street 09-13-2021, 04:28 PM
Replies: 25
Views: 3,163
Posted By Joe's Garage
Look like factory pistons to me, too. Most likely standard bore.

And the cross-hatch is kind of light - what you'd see from using a 'ball hone' on a drill.

Plenty of these motors were 'rebuilt' in the 1970s and 1980s by installing new rings, new bearings,...
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