the idea isn't to smack two hardened hammer faces into each other. maybe I wasnt clear enough. the bigger hammer is just to back-up and absorb the blow to the stubborn (internal tapered)part that is being struck on the other side. Kinda like a sandwich. If you don't back it up with something the part might move around on you, and avoid the hammer strike, giving it just a glancing blow.If you use the 2 hammer idea...make sure that at least one of them is brass or lead. Hardened steel will sometimes shatter when struck strongly against each other. Ever break a chisel ? I also would be replacing the parts anyway. Especially if they are old. The parts are not expensive and can only do good things for you and your cars front suspension/steering performance.
3/4 in. Ball Joint Separator
Works great on both tie rods and ball joints
Most auto parts stores have them too