Steve, A 4.25 bore would be .085 over not .010. Are you sure about the bore? Factory is 4.165. They did have some factory over bore pistons for blocks that had an issue from new but finding one of them is going to be, well lets just say if you find one, play the lottery that day. Nick Alfano Performance 4849-76 st. Kenosha, WI. 53142 262-308-1302 262-942-8271 after 6pm central and weekends -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20130718/5b3b007a/attachment.htm> _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com