k frame causeing wandering??

hey guys so i finally got my 440 duster to the track this year..but after makeing sum 11.4 passes and letting out of it due to severe wandering, im now on a mission to find the cause. Everything up front susepnsion wise is new. factory control arms..all new bushings..no sway bar. i talked to direct connection and the guy said that factory k frames will break a sleeve in that somewhere near the lower controls in the k frame due to weak factory welds. has anybody heard of this or expierenced it????? tubular k frame is the next step?? please help!!!!!! :study: thanks -chris