Maximimum motorsports rear grip package with HD lowers, panhard bar and torque arm is $1100.
An IRS alone costs almost as much as that and out of the box other than ride quality, it's inferior in every way.
I take no issue with IRS swaps (I personally don't like limited wheel choice).
But for many users it really needs to be heavily upgraded.
MM upgrade kit's range from $600 to $1200 and level 5 half shafts are $1600.
Which Subframe connectors did you end up getting? The ones with the seat supports?
YES!