Different Options For Rear Suspension!

First of all, Hi there! I´m from Portugal and I am the proud owner of a Peugeot 205 Rallye that I am rebuilding at the moment. This is the "Euro" version Rallye Anyway, on to my question... Do the Peugeot 306/Citroen ZX/Xsara rear suspension arms fit the 205 Tube? I've read in one of the french forums that one of the options of increasing the rear track of the 205 is mounting the 306 arms in the 205 tube. Since rear 309 GTI beams are very scarce over here, this would be a great option. Any input on this?

I have a look through the wheel alignment data I have, and found some interesting results, here's a summary: Year--Model--Rear toe in (mm)--Rear negative camber(degrees/minutes) 1985-92--205 GTi 1.6+1.9/Rallye--3.60--0/50 1985-92--205+309 base--3.10--0/50 1993on--205 Cab+van+base--3.40--0/50 1986-90--309GTi--3.80--0/50 1990-93--309GTi+GTi16S--5.00--1/15 1994on--306 S16+GTi6--4.20--1/20 1997on--306 1.8 16v--3.40--1/20 1998on Xsara base--4.50--1/20 1998on Xsara VTS--5.00--1/20 1993on ZX base+16v--0.00-1/00 Quite suprised to see that the ZX has no rear toe in, unusual on FWD!