Spark plug change does make a difference. Go ahead and get the Granatelli COP Connectors upgrade while your at it. ($100)
They work awesome with tune.
Make sure you are running 93 and are programmed for it, HUGE difference over 87!
I have the lisle 65600 tool needed for the plugs. 4 of mine broke, really not a bad job as long as your rear one does not break.
Not sure what my 0-60mph is, only have distances on my time stamps from the tracks. I should be pretty close to the 8.5-9.0 second range with my mods I am guessing...
Also 4.56 gears WAY to high unless you tow all of the time. Just a lift and bigger tires, 4.10s. Also seems like your time stamp is pretty important. I know a lift and big tires look good, but if its speed you want, you will have to ditch 'em
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