I am restoring a Stuart 600 engine,does any one have set of dwgs,? Does the dwg state what type of sealing ring or material is used to seal the cylinder liner into the engine bed ,full size engines eg Ruston Hornsby and other makes usually used a rubber o ring.My stuart liner has a groove in the liner and the bottom of the groove slopes a 10/15 degrees towards the head end of the liner ,it may be that soft packing was used and the slope on the bottom of the groove compresses the packing as the liner is pushed into the aperture in the bed,or is the angled groove not to dwg and just the idea of the builder as all 600s were only supplied as castings,though some larger parts could be supplied finished at extra cost. Also does the dwg specify what threads to use ,my engine uses BSF so I am assuming that it may have been made in the 1930s, they appear to have been made as early pre ww so I would expect early ones would have Whitworth threads.I would be grateful for any info as I do not want to get it restored and running and then get water leaks around the liner.