Hotter plug for 302"

Been running a Autolite 45 spark plug in my 302" Ford 'T" bucket. What would be a good choice for one step hotter? Autolite? Champion?

 

Auto light 46 would be one heat ranger hotter..

Though auto lite plugs were being made in china... so that being said.

I've been running motor craft plugs in my sbf.. those are made in Mexico..

Champion and ac delco are made in Mexico too.

Ngk brazil mexico and japan
Bosch mexico hungry and Germany.

Haven't found a usa plug recently.. unless you can find some nos stuff.

I have a box of motorcraft plugs from 1966 those are made in the usa

 

That figures! Nothing made here and they say "buy American"??

 

I thought mexico was a state..?? Lol..

I think I've seen some ngk plugs that were made in the usa.. though they were probably for a bmx or some foreign appilication