12Bolt Housing Ends, with C Clip eliminator. What brakes??

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Hello Guys

Not a big poster here, but have an issue i am trying to solve.

I am building a 70 Nova, with a built LSx, and t56.

The rear axle has 12 bolt housing ends, wiht the GM 3,150 " bearing, tapered.

This is the style where you have a seal in the center to the axle, and one on the outer, and you use the retainer plate to preload it, and seal to the housing.

What brake kit fits to this? I have found wilwood to have to thick backing plates, causing the retainer plate to bottom out before i have the desired preload..

Any input is appreciated, i am literally seconds away from remelting the whole axle, and trade it for an old monkey bike

In advance, thanks.
Nils Eirik Wenaas