Thanks. Two of the liners were 'ok', but the worst one was almost flush, and 2 thou at its highest point. I have been struggling with overheating pretty much since I got it. I am thinking that perhaps I should go with a new block and the westwood liners, so at least I know I am starting from a good place. The head is also a bit soft (tested by DVA) and will need replacing. Unfortunately it is a VHPD one, so a new head will need some work to flow as much as the current one - or do a VVC conversion, but that won't look 'original' - though not sure how much that matters. The current head has been peened, skimmed and shimmed, and a non MLS head gasket used, to try and get to the end of the year - just trying to plan what to do next.