I swapped my 68 Firebird steering box with one out of a 74 Pontiac Lemans. No modifications were necessary, just bolt her in. I got much better steering response with this steering box. The wonder touch steering in the 60's made for very powerful steering with little effort but made it too loose. I have no idea as to what the adjusting will do.
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88 restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________