T-bird style FFR IRS conversion in 80's German classic

[imagine-02]

I've been searching for IRS suspension donor cars for years, trying to find the "right fit." After mulling over several designs like 135i & Rx8/Miata mult-link, and S2000/Miata/C5/C6 double A-arm, the FFR pin drive width T-bird style setup seems the most straight forward in my situation.

I basically want to do exactly what they did to the Comet Wagon in Street Tech Magazine a few years ago, https://streettechmag.com/2015/08/06/independent-thinking-factory-five-racing-irs-conversion-for-the-comet-wagon/

It looks like FFR is all about their newer Mustang style suspension now, but I need the narrow pin drive width for my application, so that's why I'm interested in the "old setup."
Does FFR still make the pin drive width parts? I believe I would need the upper and lower control arms, upper and lower cages/sub frames, hand brake parts, and coilovers. Hopefully the control arm and coilover mounting location dimensions can be provided too, so I can maintain proper suspension geometry.


Couple random questions about the T-bird style IRS:
Have any brake upgrades been figured out?
I've read about using the newer Mustang bearing/hub in the T-bird spindles. Do you then use a Mustang rotor?
Any advice or tips about this suspension setup?

[michael everson]

A retrofit kit popped up on Facebook recently. Think it was on the factory five builder page. It was a pin drive old style using the T-bird IRS Here is a link to it.
https://www.facebook.com/marketplace/item/2502276823356438/
Mike

[imagine-02]

Found someone who makes a caliper adapter, so the larger Mustang Cobra rotors can be used with T-bird calipers and spindles.

What sway bar is used with the pin-drive IRS?

Any more leads on pin-drive components is appreciated.