340 .040 Bore Okay?

The factory said you could go .040.. that's the only thing I know there is thats written in stone. LOL
Everyone is right ...only a Sonic test will proove/tell you . Late '70s 360s were pretty bad . .040 over was iffy. Had the entire cylinder go away, no.5...
Roll the dice and risk paying it twice.....or pay now.