yeah all you guys are on smack! lol
like kranzy said;
jack car up & support on stands on body, sit the jack under the rear frame & jack up enough to take the weight, losten the 4 bolts but leave a few threads
now take off one side (the 2 bolts) & lower the frame to clear the tank & remove the long ass bolt & your arms..fit new bushes..put it all back together (leave bolts loose) & repeat on the other side
when your done jack the frame up to take the weight & tighten the 4 bolts & put it all back together, a few speed humps will settle everything in
oh & don't forget to check wheel alignment in a week or so
on mine i put the bolts the other way just incase for next time, makes life easier