Tube chassis question

What 944 trailing arms are you using? I've got '86 Turbo parts, and I was told that the 16x7 Boxster wheels are about the biggest I could go and not have to flare my Ghias wings. Seeing as how the 944 parts bolt to a type 1 torsion tube and uses 944 axles though, I can't expect either torsion tube to make a significant difference on the track of the car. I suppose the exception would be if the 944 transaxle is A LOT wider than a type 1 transaxle.