Positive or Negative Roll Radius?

[SprintStar]

Can someone l list the offset of wheels that came with the early vs. late Supers?

I'm doing some thinking about the roll radius and I'm baffled...

Does the late Bug come with negative roll radius? I recall reading it. Does the 924/944 come with it too? Yes, I do recall that too. But how come my early Bug with complete 944 brakes and suspension has positive roll radius?! And I'm using Boxster rims which should enhance the roll radius even more...

How did I find out? I experience some bumpsteer and uneven braking, hence leading me to check for simplier things like tie-rod angles and stuff, which checks out ok. Now, only roll radius is left and from all the stuff I've been reading online, it seems it's the culprit.

But WHY?!?! Unless the early bulkhead is not giving me enough whatever as the mounting points are higher than the late ones.

Someone shoot me....

Sprint.