Bump steer Hell

[427v8]

I've never seen such good discussion on suspension anywhere else.
I love this place!

Anyway...
I built my own rack and pinion conversion for my '69 Vette. It works and all but trying to eliminate the bump steer is killing me.
I have the general ideas but it seems evertime I change something it gets worse not better.

So;
Question 1: Is there a good discussion on how to measure and eliminate bumpsteer? A book maybe?

Question 2: How much bumpster is too much? Some people have said I should try for zero, Well, zero what, inches or microns??

Question 3: There are basically 2 bumpsteer errors that I can see, tie rod height and length. Is one worse than the other? Should I try harder to get the tie rod length right and not worry so much about height?

Lastly, is there a way to calculate the correct values for tie rod length and height without buying a $10,000 suspension design program???

Thanks in advance
Keith