My first post so bear with me. My 53 3100 has a 54 235 in it. I just gave it a treat of reworked head (new stainless steel valves,new rods,)put her back together and can't keep a good spark. New coil,new points,new plugs still no spark! When there is spark she starts right up but the dwell flucuates, could it be as simple as a bad set of points?