Given the way the toe is adjusted on the rear of a Stratos (Lancia, Hawk & Corse "I") then is is fair to assume that with the symmetrical reverse lower A arm design then with the correct amount of toe in applied you would find that the rear strut is actually vertical?
For every adjustment of the rear toe then the strut will alter in angle but with toe in applied it will pull the outer end of the wishbone forwards which would bring it back into line with the top mount?
The strut top being set forward by 23-25mm relative to the wishbone bracket could make sense in this case?