Can the ARB be fitted with no weight on the rear suspension?
I've loosely bolted the bar & U brackets to the car, and the droplinks to the upper arm brackets - and the holes at the ends of the bar will not reach the studs on the bottom end of the droplinks (they're about 1.5 inches apart). They might reach if the upper arm was moved up to its normal ride height (or they might not).
I've got the bar this way round - long straight on the LH, short straight on the RH.
Here's Rimmers diagram for reference.
https://rimmerbros.com/Item--i-GRID001546