440 spark plug gap?

[jonnydart440]

OK, so I'm finally tuning up my dart. I got Mopar electronic ignition, a 70's smog 440, likely lower compression, very mild build. I got copper plugs, what do u guys suggest for gap??

 

[krazykuda]

I would run them .035"

 

[moe7404]

if you want to experiment. the wider gap will blow out at higher RPM. if the only experiment is a wider gap and it misses at high RPM then close the gap. i find i need to run colder plugs than most. by one to two heat ranges. i have ran street engines at .045 with no trouble, but not at racing RPMs.