Trying to install the large main bushes into the rear beam of a 2wd saph, has anyone got any good tips? We've done it twice before with a fence post between the beam and a roof joist and a trolley jack underneath but it wont seem to work this time. The other times we have used poly bushes and this time its a pair of original rubber mounts adn we got the 2 ton trolley jack on its limit! Any help would be good

Thanks