nx 150 shot on 2001 gmc 6.0L help please!

[Frenchy]

thanks, now that thats outta the way, do i need to step down in temp range on my spark plugs? or just take timing out with a programmer? thanks again parker! sweet looking ride!

Woah wait, what? Programmer? Get a professional tune. Tell whoever tunes it how much you're spraying, just to make sure you're safe.

[Sierra2500HD]

the diablo sport u7198 has stepped timing controls, between rpm ranges i.e 1-2k 2-3-k 3-4k etc .. if that aint suffecent then i will tune the shot down to 100..