help!!!!!!! 94 sundance dumping gas out exhaust with white smoke help

i have a 94 plymouth sundance/duster 3.0 v6 5spd its been dumping gas real bad and has white smoke and gas coming out of exhaust already replaced head gaskets and have no clue to what the problem is could somebody help

i have the same car and it was blowing white smoke out the exaust and i had it fixed and the mechanic said that it was bad valve seals or somthin like that he said that it is typical of that engine with higher miles