yet another top swap question

[xcwilli11]

So i have the following mods
Zzp tune
Top swap
Gtp injectors
90 valve spring and retainers
Hot air intake
180 t stat
Poly motor mounts
Pacesetter headers
1 3/8 inch radiator
1.9 rockers
Ported supercharger
Egr valve blockoff
Ported L67 throttle body
And eventually a pulley drop

The question is i have 2 sets of spark plugs, platinum 103's and copper 104's, What should i use.

 

[dsmuts]

I'd run copper 605's

 

[Speedy1973]

^this

 

[xcwilli11]

Yeah, I'll look into them

 

[Scottydoggs]

with the pulley drop the 104 may work. once you start modding you need to try a set or two of plugs heat ranges at different gaps. you'll know what feels best.