Most the KA's ive seen the starter is on the front of box so cant see an issue. Certainly wont be an issue if you use puma box etc.

Puma PAS works fine. You can use the PAS pump with KA rack or puma rack. If you use puma subframe you may want to use the puma rack anyway as it bolts to the subframe where as on the KA it bolts to the bulkhead instead.