RMS rear 4 link, not symmetrical?

Jack the rear up in the center and see if its the front causing the lean. And then do the same for the front. Could be torsion adjustment in the front.
its got coil overs up front too. The passenger side is an 1/8th low.

Your drivetrain is offset to the passenger side so there will be more weight on the passenger side requiring more pre-load. However, lowering / raising the height on the drivers side front (torsion bar or coil over spring) will also effect the height of the passenger rear.

Welcome to 4-bar 101
thank you for the info, front is on coil overs too. Passenger side it up 1/8th I’ll level that out and pull the rear springs to compare and see what we’ve got. Also there’s no engine or transmission in the car at the moment.