The real problem is getting the old ones OFF ! Get some new rubbers and the liner bush as the bolt will most like have rusted in.Cant remember where exactly I jacked mine......find a solid bit of body and use wood blocks to spread the pressure.You only have to jack up a little to support the weight of the body off the chassis....too much and you will make it even harder so go easy.And if its a weekend job go buy everything you may need now,bolts,washers,bushes,grinder discs,gas,whatever cos odds on you WILL need them.