Moog off set upper control arm bushings

Does anyone know how much more caster and camber can be achieved by using the offset bushings? I recently switched the front end on my 71 duster to big bolt pattern, and I bought a kit with UCA's from CPP. When I went to get the car aligned, the drivers side I could get 1 degree of caster and .5 degree camber. The passenger side would only spec out to -2.8 degrees caster and .5 camber. I bought QA1 UCA's with 3 degrees caster built in, but I can only get the passenger side to 1.5 degrees now. So I'm debating on just returning those, and buying the offset bushings.