62 cj5 f 134 new build. Went for a short drive yesterday to put a couple of miles on my Jeep and to get some gas. I went through the neighborhood because I don't yet have a title. The motor ran great on open stretches but went dead at every stop finally not starting for an extended period. After much effort it restarted and got me home where it died while idling. I have the fuel pump with the glass bowl and vacuum pump which is plugged off. I can see gas moving at idle and the bowl is full at speed. I have cleaned the carburetor twice. Could this be a timing issue? I have never found the timing mark? (I know where it is supposed to be). As usual, I appreciate your help.