im looking for 5/8" plugs for a 440 with headers. space is tight. suggestions welcome.

Heat Range , would .480" in, be to hot ? from 3/8"

i only found:

Autolite 132's suppressor
Champion V59C 3/8" 5/8" copper
bosch bp6hx plat 3/8 5/8" tappered
accel's header shorty plug 3/8's by 5/8" resistor.