Looking great!
Where did you source you alloy hubs?
PS. I still have some of those brackets if anyone's interested 😉

Ta Paul, it's coming along slowly, and not without it's frustrations. . . but that's modification for you, comes with the territory I guess. 
The hubs are from GRP4 Fabrications in Ireland, as is most of the front end to be honest.
They're fitted to GRP4 coil over struts though, so essentially they're for Capri stub axles, or at least these alloy hubs are.
Just thought I should mention that Paul's brake adapter kits, either for front RX-7 calipers or rear R31 Skyline calipers, are well thought out, well made &  well worth buying. My problem had nothing to do with the kit itself, it fits perfectly!
 
Cheers,
Jason.

Thanks Jason. Appreciate the feedback.

Jason, where did you get your calipers from? Going down the same path

This is my set up. AU Ford 5 stud hubs and rotors with WRX callipers UK Capri struts with Bilsteins and custom adjustable hats. $$$$
 
Chris
 
 

I bought the pair of calipers from "Rockauto" in the USA when our dollar still bought just over $1 US, so they were pretty cheap. . . about $225 AUD including delivery for the pair at the time.
Completely reconditioned with new pistons, seals, guide pins, hardware , etc. & a new spring clip for the pads too.
I dug out the receipt for them, they are "semi-loaded" calipers for a '1989 Mazda RX-7 1.3L R2 Turbocharged'
Centric part #CEC141.45035 & CEC141.45036 for the right & left caliper respectively.
That's exactly what I have, but there's heaps of other options on the Rockauto website for the same model year. . . loaded, semi-loaded, loaded calipers & also from a range of different suppliers.
It's all on here. . .
https://www.rockauto.com/
. . .  if you open Mazda, 1989, RX-7, 1.3L R2 Turbocharged, Brake/Wheel Hub, then Caliper. . . you'll get the whole list of options.
The same pair I bought would cost about $350 AUD delivered these days, if delivery is still about the same.
Don't know how that compares with the same spec from Australia at the moment, if you can find recoed ones here.
It was cheaper & less hassle for me at the time than buying second hand & rekitting the calipers, that much I'm sure of! 
 
Cheers, Jason.
 
 
 

Cheers jason, hopefully they dont sting me too much with postage!

No worries.
Postage was $98 US in early 2013 when I bought them.
The calipers I bought have gone up $10 each since then too.
Good luck mate.