Help with Ford 9" and LS1 brakes

[67rstbkt]

Posted this on PT and here, hoping someone can help me:

Hoping you guys can help me out of this mess I think I created. I narrowed a 9" Ford I had and used Moser 7900 housing ends. These maintain the Ford bearing size while using the GM pattern for the brakes. My plan was to use LS1 Camaro/Firebird brakes. While talking with QT performance about ordering axles, he said:

"I hate to inform you but the ends you need for those brakes are Part # 7900FM. The difference between these ends and the ones you have is the 7900FM are called "flush mount" as they let the axle bearing sit flush in the housing end. The bearing bore is deeper. The ends you have will leave the bearing sticking out 1/8", which is common for the 9" style bolt in axles. The factory 93-02 Camaro backing plate will need to sit flush against the housing end to work properly. One might be able to carefully machine the bearing bore deeper to allow the bearing to fully seat."

I've put way more work into this rearend than I want to admit at this point, all the points for my 4 link are welded on, housing is completed. Any suggestions on how I can salvage this? Can I remove the 1/8" from the brake backing plate? Has anyone else run into this issue? Any advice appreciated