I might get roasted for some of this, but here is what I have used/learned- many views on spark plugs here. (Kinda like valve lash threads here)...LOL
Here are few I remember: AC R45TS I think "TS" is tapered seat "R" is flat. This is a stock SBC plug.
NGK: BKR5E stock; the lower the number, the hotter the plug.
Bosch: F6DSR again stock.
not sure about hot/cold on your application due to set up; spray/no spray etc...
I use Bosch Platinum in my BBC... Why?? Ever try to start high comp motor in the winter w/ no choke? Fouled many over the years... I have noticed that platinum's are pretty hard to foul... & if they do, they will work the next day after dying out. JMO.