rack n pinion front steer ackerman issues...explain...

Have you ever posted this, details, photos, what rack you use?

I've thought about a rear rack. In fact, I have a "rear steer" rack. Big problem for me was figuring a good way to deal with the extreme column to U joint angle to get to the rack.

A set up like this, tho "properly done" would not have the issues the OP was talking about.

You just need a way to hold the steering shaft in a set location once you move it south at the extreme angle. Not a big deal at all. Many chassis builders do this all the time regularly.