As I understand the proper 3 link solution, you pretty much give up the back seat. Although the seat ts almost useless, they keep the back seat,and since its the norm most when installing a cage, something does not compute, and also consider those who refuse or the enthusiasts who just shy away from, simply cutting the floor for proper frame connectors.

For those mentioning the desire for a panhard bar or watts, not sure I see the need at this level, other then bling, and if the car is at 9/10ths, thee is little stopping anyone from fabbing their own, especially if their car is already decked out to 9/10's. The problem additionally with the watts, The OP can't solve, there is little room for a rear exit exhaust.

The weld in oil pan kit comment, Milodon/moroso seemed to drop it after decades selling it as a universal kit, because I suspect lack of demand.

How about a mopar specific spline quick release steering wheel hub?

An alum retrofit PS replacement housing.