At the junkyard,where the proper tools,air hammers,etc.arent readily availabe,they remove the nuts to the steering arm,and put a jack under it and lift the entire truck up about 3 inches,so all the weight is on the steering arm(put a jack stand or large wood block under the axle so truck wont crush you if it falls!)hit it a few time with a heavy sledge and it will loosen the cones on the frontmost studs,then remove the jack and hit it downward like the other post said,then the cones usually come up about a half inch and vise grips take them off fairly easy. This method is what I've seen work the fastest on rotted new england trucks.But nothing beats the right tools like an air chisel--a pickle fork can be inserted under the steering arm after it breaks loose to help persuade it also.Sometimes the blue wrench is the only solution. /forums/images/graemlins/weld.gif