BrainFearGone
Forum Member
Trying to find the right plug for a BBF. Have a set of ar33 and 32 right now. Which are heat range 2 and 3 for auotlite which 2 is the coldest. Im thinking the 33s are goin to be too cold for a 10:1 compression ratio. Anyone have any input? I think autolite 124 is my next choice which is one heat range colder than stock.