Well even without any help from any of the members here (thanks to that turbo charged prat)
i still managed to make excellent progress. Let me educate you.
I discovered the 924 Turbo has X diagonal braking just like my 924 n/a Even though it has all round discs.
its able to utilize the diagonal sysem as it does not have the wide body offset wheels of the 944.
944's have to have front/rear tt split brakes! As it wud be unstable if 1 circuit failed in a diagonal x system on the 944s wide suspension geometry
However a 924 narrow body is stable with both diagonal and front/rear systems. Late 924S has front/rear as standard.
Im using the 944 brake calipers from a 944 with stepped master cylinder.
The 944 m/c has too size bores - to ensure the front calipers create more braking force than the rear.

The rear brakes are connected to the narrower bore of the cylinder on the left. Id like to know if the cylinder can be removed from its original booster shown here, and bolted onto my exsisting brake booster? this would make things easier.
Obviously 5 stud brakes mean i need to find some 5 stud wheels. But using 944 alloys with set offset 7j rim, will stick out from the 924 narrow body. Meaning the GT kit will be needed. I prefer the narrow body. So im looking for 6j wheels from the 924s which will fit within the body. I find teledials a bit obvious. I want to get the cookie wheels but i dont know if there made 6J?