70 Dart. Looking for More Castor, QA1 arms or Moog bushings?

1970 Dart with large ball joint uppers. The QA1 arms state 3 degrees more castor. How much can I get with the Moog offset bushings? Anyone use these QA1 arms? What's the quality? QA1-52301 Thanks.

The QA1 arms are the nicest tubular arms on the market. They also allow for clearance of high offset wheels should you desire to go wide. I run 18x9s on the front. The offset bush ings do not allow as much positive caster and are rubber which allows a lot of flex.
Furthermore, don't get too caught up with excessive caster, 3 degrees is fine. Most guys with high caster don't realize there is a jacking effect in turns which is very unsettling at speed. I run my car on the track occasionally and run about 4 degrees.