alignment woes ..offset bushings

thanks for all the help guys..heres what im dealing.with.73 duster.changed k from /6 to v/8 all componets are brand new moog or e/susp..took it to a chain shop supplied specs.. my son was in a hurry so he could drive[youth]..got it back drove like terrible and having to correct steer..took it to a shop that does old school of which iv had experience with and everyone recomended..got it back and it still wanders and you have to overide it bring it back and it will go the other direction..back and forth.better than the chain shop tho.checked play in st box and its to spec...went back and told them about it and havnt had a chance to take it back... thot id do offset bushings first..HELP...J