1302 disk questions.

[72supergl]

ok here it goes. First I have a 72 1302. Secondly i just purchased a complete 85 944. I've read all the threads here and some on stf but it seems the more i read the more i get confused. First it is my understanding that with a shim for the ball joint I can fit everything from the spindle out if i switch to the 1303 front lower arm. and secondly for the rear i can bolt the trailing arm and everything else out without major modification. is this correct? Now i think I have that straight I'm running a Type one 1.9 right now but am in the process of building a 2.3 type four. my other question is I've learned that the turbo calipers and disks are larger. What years are they from. and how much more modification is required for this setup. and lastly since i have the 944 master should i switch to that for now or Should I stepup to the 911 unit now.