Any down sides of going Borgeson vs Firm Feel?

my 70 aar had the optional fast ratio power steering box, and except for my rack & pinion police intrepids, and 5.7 hemi police charger, it was the best handling mope I've ever driven. Come to think of it my 79 300 had pretty good feel, too, but that was a factory "firm feel" police box in those.

The power steering in my 66 Coronet 500 sucked even with a 440 in the nose. A Firm Feel stage 1 was a mega upgrade.