What plugs to use in a TO35?

[gearhead1]

I got an owners manual for my TO35 and the Autolite/AC/Champion plug numbers it gives are no longer sold. I tried to find a cross reference on google, but not much luck there.

I took the old plugs out, 3 of them were an Autolite 386 and one was a Champion D21. The only thing I could find between Autozone, Advance, and Tractor Supply was 4 of the D21 Champion plugs at Tractor Supply.

Are these the right plugs?

Thanks!

 

[JJ. in B.C.]

Mine ran the best with Autolite 3116