Best Coilover IFS for '71 duster?

Old Man Mopar said

Those are sweet and Hi-Tech looking but the power rack conversion alone is over $2300.00 shipped and then
you have to adapt it to your Mopar. You will have still all of the rest of the stock suspension and steering parts.
Not necessarily a bad thing as long as your engine swap can tolerate the space for torsion bars. If you then
need to add coil over shocks and tubular control arms, of course the price climbs.

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Well, that's very true. That is why I said that I didn't want anyone to think this was a bolt-in deal, and certainly not for the average person. Nor am I advocating this design for anyone else, for that matter. I wanted to retain the stock suspension and components and would have kept some form of stock style steering box ( probably 16-1 manual ) but could not because of the engine positioning. Money was not the issue. If I had wanted a coil over type suspension I would have bought one, but I wanted to retain as much of the original musclecar soul as was possible, and that most definitely included torsion bars and leaf springs.