Have had this engine out of my 36 5 w for several years ,has not run in over 50 years,finally got it apart,tearing up only a couple of valve guides and valves,after hot tanking engine and cleaning had Jim come ove r and mic everything,everything was in tolerance decided to do a valve and ring job and go with it,have a little green book 37-48 that tell how to do this,have accumulated all the tool over years to do the valves.Took awhile but came out really good,here's some tools I used,
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Used a dummy valve to get length from seat to lifter ,took this measurement and zero out subtract .012 or .014 ,zero this out,measure valve,which always comes out on + side ,tells me how much to remove,works every time.