Ok.. a buddy of mine was driving behind me and said My car puffs a little black smoke out the exhaust when I accelorate from a dead start at full throttle and when kept at full when it shifts.. Took it for a long cruise 350 miles round trip.. it started as I climbed elevation.. then continued as I got home.. I changed jets.. I was running Edelbrocks. 401.. and the 1347 metering rod.. and blue springs.. changed the jets to the 398 and 1547 rods.. and blue spring.. smoke is minimal but is still there when I shift.. and hard launches