Only mods i have now is a cai. Just hit 80k miles so changing my plugs. Later down the road ill have pulley, tune, and exhaust. Ive searched and found a few different options most are the copper core autolite 605's. I did see Ngk tr6s, i use these in my 03 cobra and have worked well with boost And in my small block s10 ive used delcos. Theres no real point of me going to a cooler plug with stock boost i know, but i was pondering just putting a step cooler then stock so i wouldnt have to mess with them again. Seeing how i dont know when ill get more mods how badly would a set cooler affect a stock boost motor. Im leaning towards 605s since they seem to be proven with boost. Thanks you guys.

Cliff notes:
Stock heat range
tr55s
copper 605s?

 

605's for sure- I've seen people run those stock (on L67's) with no problems with fouling and such. When you add some more mods and get up closer to 300 crank hp (3.4 pulley, rockers, headers, etc- all the other supportin gmods)- then the 104's will be a better choice.

Just keep in mind they're copper plugs, so you're gonna have to change them more often.

 

That settles it what about gap size?

 

.055 to .060. Most guys do .055.

 

Yeah, I did .055 on my gp- these stock ignition setups are pretty strong.