Preferred LS spark plugs?

[Swarm49]

I built a 2005 LS6 with an Eagle 383 stroker kit and now need plugs.

Factory plugs call out

NGK IX Iridium Spark Plug 7397
or
Bosch Iridium Spark Plug 9602

And MSD has this:


MSD Performance Spark Plug 3713

What do y'all recommend?

NA motor, no NOS either.

[badazz81z28]

I built a 2005 LS6 with an Eagle 383 stroker kit and now need plugs.

Factory plugs call out

NGK IX Iridium Spark Plug 7397
or
Bosch Iridium Spark Plug 9602

And MSD has this:


MSD Performance Spark Plug 3713

What do y'all recommend?

NA motor, no NOS either.

I use stock Delco replacements in my H/C/I LS7

[btmatt]

same, delco replacement on H/C/I LS3

[Swarm49]

Thank you both!