Subframe conector replacement

Sounds odd I know but having got the car back to New Zealand I've got a couple of compliance issues. One being the welds on the connectors also when they where put in the guy notched them for the brake line and fuel breather line. ( Personally I would have removed the breather and moved the brake line which is what I'm planning )
Question I have if I remove one at a time will the body twist etc if placed on a 2 post hoist or am I better to try and do it on the floor with axle stands at home if I use the hoist there is a welder there unfortunately I can't borrow it to bring home so I'd have to buy or rent one I guess.
Main reason for replacement is to tidy it all up as the notched bits look messy and would take forever to fill and grind etc to look right.