I have all the basic bolt ons..... noss head, 21cc domes, 30mm carbs, uni filters, vf3's, some porting, and 150ish compression. I finally just ordered the adjustable timing plate. I know everyone one with mild upgrades go about 4+. Is that what i should advance to base on my compression? How much of a difference do you think im going to feel when i advance it? Thanks