i don't give up easily, the one thing that bothered me was the backfiring, sooooooooooo, the one thing that had been change about the time this all started was i had the timing reset because of pinging by the people who do my major work, he also build race cars and races the so i figured he knew what he was doing. soooooooo i went out and messed with dist. setting first clockwise no start, counter started a little easier, more almost idles still backfires a little, but is better. will order new carb i think that is part of the problem. another question, i had to remove the down tube and no fumes came out but did come out the oil fill in copious amounts, is that a problem, maybe to much back pressure some where, or is it the movement of the truck that will draw it out at speeds? RON