Only way to tell is to hook it up to a scanner. If you think it is knocking now what do you think it is gonna do with that 3.4" your going to throw on there? Put some higher octane, Autolite 605 spark plugs and a cooler temp thermostat just to help things out a little if your paranoid. Have your friend that can tune...tune it on the stock pulley and up the timing till it starts to knock then back it down a degree or two...then it'll run good.