Hey. First post on sight. Working on my 74 FJ40 and having trouble getting it to run smooth. Looking into distributor as it has some play at rotor... and jumps around maybe 3 degrees with timing light. It has the vac retard dizzy and so considering the options. Would the china electronic be a cheap quick fix, or should I find a newer advance type dist... say 1977. I can get a rebuilt 77 one from Cardone for 140. Not sure of best options. Thanks for some input.