Finally got the job done, the lip on top of the new liner measured the same as the old one but the shoulder that sits in the block was thinner, I got various thickness shims in the kit so just measured the old liner and shim and set the new to the same, when I set it into the block it was flush I had the cylinder head resurfaced / ground the valves in / new stem seals/ and had to replace 1 x hydraulic lifter / piston rings / connecting rod bolts , putting it all back together was straight forward I played on the side of caution with having the head resurfaced and used a 2 hole cylinder head gasket as the valves are proud of the head . I have replaced water pump and all pulleys with the new cam belt, with the crank and cams locked with pins I lined up the pump marks then clamped the belt to pump and cam gears with wooden clothes pegs to stop belt moving while I set the belt tension When I finally got all the plumbing back together and with a fully charged battery as soon as I got diesel up to the injectors it fired right up , I have had it running for about 1 hour coolant level stays fine temp gauge goes to just under half heater works better than it ever has , at the exhaust it runs very clean now