Early A subframe connector question

For a winter project I'm going to install subframe connectors in my 66 Barracuda. I've already picked up the 1 1/2 x 3 rectangular tubing material, but now I'm not sure I can use it.

While looking down the underside of the car it looks like the floor braces that come off the rockers need to be cut. It looks, to me, like the braces are going to interfere.

Before I start hacking things up. Can anyone tell me for sure I need to cut them shorter? IMG_20201128_152031597.jpg