Dr. Diff, B rear into E body question

Put a b body dana in my 70 challenger using Dr. Diff's offset hanger kit (kept the b body spaced spring pads on the rear) While trying to install the rear valance(dual exhaust cut out), I found the inner braces in the valance hit the rear shackles. Can I wriggle the valance around and make the braces clear, or will I have to trim them?
jess

If you have an OEM valance with exhaust cut-outs, you must trim the braces.

I found this out the hard way too

You can also install the shorter shackles I produce for clearance on Barracuda models, but this will lower the car.