For what its worth Its not a case of ‘not believing’ Mopars recommendations...its more a case of wanting to understand the physics at play.

The term I queried was ‘defeats the purpose’....I think ‘surplus to needs’ might have been closer to the reality, anyhoo.....its semantics...I just got confused

After more reading I now understand the stiff front segment allows the rear segment to flex and plant the tyres...and that its unlikely the snubber will even contact the pan....so I get how they work now.

I guess the MP 27” extension shocks were old school tech, probably designed to be used with factory springs and a snubber .

The point about using a modern shock to control the housing is a good one.

Thx for the input.