berk will wire the harness with the MAT and IAT sensor wires hanging off it seperately and already attached to the patch loom so you can coonect the MAT and IAT sensors directly to it, thats how mine came
you wont be needing the afm plugs by the looks of it
also your running 15psi on hiflowed ct26 are you still usign the stock fuel pump.
im plannign on doing this soon as well but with a power fc
ur so lucky to get the gen 3 ecu that cheap i couldnt even find one when i was looking for it
iil be keeping an eye on this thread
let me know how you go as you will probably get it done much sooner than i will, i started last year lol just been lazy