104's or 103's

[sic40th]

i have been running my new set up for a couple of weeks now and i am running autolite 103's(gapped at 50) and i am not quite sure if they are the right choice.my set up is s1x cam,headers,3.25 pulley on a intense tune. are these to cold or am i good.

[blueguy]

If you run 104's and the car doesn't knock then run them...the trick is you want the hottest plug you can get away with...not the coldest.

[2001goldGTP]

try 104s i meant they are cheap, my xp cam did not like 104s and i had to step down to 103s

[blueguy]

try 104s i meant they are cheap, my xp cam did not like 104s and i had to step down to 103s

What pulley?

It isn't based on the "cam" not liking the plugs...