I had a friend of mine e-mail me some pictures of markings on top of the pistons of a chevy 261. Is the 90 on top of the piston an oversize? I thought .090 over would be kind of an oddball oversize. Would it be a marking for .060 over
[IMG]http://i1168.photobucket.com/albums/r488/Boltergiest/261%20pistons/photo_zps59a40775.jpg[/IMG]
[IMG]http://i1168.photobucket.com/albums/r488/Boltergiest/261%20pistons/photo_zps59a40775.jpg[/IMG]

Last edited by Bolter2; 01/26/2013 1:00 PM.