Rocket Engine Spark Plug Choice

I need a recommendation for spark plug part numbers for a 324 Olds,
bored 1/8", un-milled #10 heads, 3-2's, Schneider street cam,etc.
It's a street rod only. Also USA made plugs (?).
An older parts guy at NAPA said AC 44S was the new # to replace the
AC 44 called for in my 50's Chiltons manual for original plugs.
The guys at "Zombie Zone" are no help of course. Most of their fathers
were not yet born in '56 when this engine was made!
I tried to contact Don Wow with this question but can't seem to get in
touch with him.
Does anyone know if he's OK?
Thanks ahead of time to BlownOlds & Heathern + any others replying.
MickeyD

 

Autolite #303

Tony

 

Thanks Tony.

 

btt for evening shift