Shorty plugs and wires recommendations for 70 Chevelle 396

Hey guys, my spark plug wire is arching badly at my number #8 cylinder against my header due to clearance issues.It appears I need to use shorty plugs and replace the wires used for my MSD HEI ignition system. I also have clearance issues by the #7 cylinder. The old Accel 8mm Hi Temp Spiral Core wires were fine until now but need to be replaced. Any recommendations to replace my AC Delco R45TS with shorty plugs and as to good wires? . It also seems I will need to unbolt the headers so I will probably need good header gaskets as well. I have been told I probably have the wrong headers but want to work with what I have at the moment as the current ones are coated and look nice.