Dual hump crossmember swap

[oldpurple]

I'm just wondering if anyone that has done this swap has any info or tips on it. I have a '79 with the catalytic convertor style crossmember and would like to swap to the older 'dual hump' style.

Some issues I can see now is that the lower leg of the frame rail on the driver's side is on a bit of an angle (to clear the cat). Has anyone modified the crossmember to match the angle? Or tried to tweak the frame to level it out a bit to help with fitting the dual hump crossmember?

Another issue I can see is the bracket for the parking brake will be in the way, and possibly the cable itself.

Anyone have any insight on this? Info or pics would be much appreciated.