Use late model STI front, lower control arms?

[Scargo]

I will be building an R and currently race a track only '08 STI. On it, I upgraded my LCAs to '11+ STI arms because they increased caster and have the new, beefier, rubber isolated "spherical bearing". This new design seems like a distinct improvement over the GD design.
Could modifying the mounting points and using this LCA be done without throwing the suspension geometry all out of whack? I don't have one of the earlier versions to measure.
Can discrepancies in pivot points and size be compensated for by how you place your new mounting points (without disturbing the basic frame)?

As a possibly related issue, I intend to use 5x114 hubs and matching spindles.