aw11 upgrade

I am in the process of replacing my standard setup with celica st185 front rotors and calipers and rear sw20 93+ calipers with original rotors off the front and 6mm spacers, the standard budget upgrade I guess for an adub.
 
Have run into a couple of issues, one being the dust covers for the front foul the larger disc so they have been discarded for now, not really sure how important they are.
 
The rear extended wheel studs I bought that are listed for the aw11 dont actually fit with the knurl diameter being too big, I have given them to an engineering shop to take them back down .2mm.
 
Im just curious what other ppl have done doing this upgrade.
 
Also it looks like i will have to upgrade my master cylinder and booster so im wondering what other vehicles have compatible parts that will get the job done eg: celica, supra, hilux etc master cylinders and boosters that fit up.