AC Delco R44T plugs? R they right 4 me

[dukcaln]

These are what is in the truck now AC Delco R44T....so I pulled the plugs out today, and they are a litle oiled or dark color, but not bad, All look identicle. I am suspecting it is because they are the plugs that got put in at the end of the build and have been used for engine breakin and set up of carb and timing.. not a bunch of miles on her...so my question with my mods what plugs and part number do you all suggest to run. Going to change since I have been driving it and dialing it in some... its a 1972 350cu, original heads just built with the mods below.