Prob 1. Radius rod too long... Solution machine it down and add a thread.

Correct...mine was machined and the nut was wound on to give more castor towards the front of the car.

Prob 2. Lower arm too long ... Solution Leave it. (ok sort it out later, a little camber never hurt anyone right??)

Correct leave it , you get wider track as well as 1/2 degree camber which is good for the street. I run 4 degrees on my race car

Prob 3. Stabiliser dosn't connect too same spot on lower arm... Solution Reinforce then move.

My stab bar is stock Datsun 1200...18mm thick. But I run 300lb springs for anti sway and anti dive.

Prob 4. Steering "attachments" different... Solution swap ball joints.

use ball joints which came with the 200B lower arms.

Prob 5. Brake lines in the wrong spot... Soultion get longer ones and move them

I used the 200B GX (alloy girlock) brake calipers which had lines which fit to the area where the brake line came through the inner guard.
But I made sure the calipers were to the rear of the car not the front.

There you go I hope it helps