Yep max out the castor all the way to the front. But be warned, u may have to shave ur front bumper wheel arch area depending on the size and offset or ur front rims, cuz it may rub.
The ball joint on the sigma arm has nuffing to do with the swap, becuz its the steering knucle which attaches to the ball joint that u need to swap over to fit the arms. (pull the stock 86 steerin knucle off the stock 86 arms and put them on the sigma ball joint).
The castor rod holes are in the same position as the stock 86 castor holes, so no need to drill new 1's.
