Those are the non-cup arms, or more to the point they are early arms, we are all being a bit misleading calling them cup/non-cup as all the late cars were meant to have the increased castor, our non cup 182 has the original arms still for example and has extra caster.
You cant give an exact figure as if you have different caster to begin with (based on ride heights) then the same shift forward results in a different degrees change in angle, but if you assume you wont add more than tow degrees and wont add less than one degree, thats a pretty safe bet.