I'm just curious for the guys that are running after market ignition systems, what type of spark plugs are you running?

 

I run autolite coppers in my Trick Flow heads. They've always done me well.

 

I'm using just regular motorcraft but, I was wondering for optimal spark if I should be using something different

 

I run the e3 with my MSD box. Runs real good.

 

before and after getting my mallory box ive always used copper. never seen an improvment moving to platinums or iridiums. if anything it seems to be a tad better with just simple coppers. and it helps the wallet :-D

 

same here, simple plain autolites. plug gap set to 1mm (0.040inch)

 

MSD recommends copper core, so I use motorcraft. I don't get many miles out of them though. Gap at .044" and I'm trying the next colder plug this time around.

 

I have a Pertronix billet distributor and I run Motorcraft copper cores. I run the ones that Edelbrock specifies for their aluminum heads.

 

just the reg. 'ol motorcrafts