What spark plugs?

just wondering what some of you guys are using for sparkplugs on your smallblocks.

my car is a mild 340 combo and right now im trying to get the carb tuned properly from reading the plugs, but so far its telling me i need a hotter plug...i figure before i do anything to the carb, get the hotter plugs and then see what the jetting reading looks like on them...im currently running champion p#RN12YC which are stock replacement plugs for the sbm

What plug do you guys recommend? how far up in the heat range should i go? also, i always thought that a performance engine would want a colder plug generally, or is that only in boosted/nitrous apps?

all suggestions appreciated
thanks!
Author: admin