I know this is a ford forum but I think this is something I thought I should share.I bought a 1954 scruby 3100 from a fellow who said he rebuilt the engine but could not start it ,there was no compression . I bought the truck figuring I had to take the engine completely apart.  When I got the truck home I took a compression test and found  Zero in some cylinders and 20 lbs in others. I took the valve cover off and adjusted the valves I now have 160 across the board. The guy was really done with the truck so he sold to me cheap.  My wife was not impressed so I had to tell someone.Thanks