Just wanting to confirm. Once I notch the K-member for a/c will I be able to reuse the brace? From the looks of it seems the bolt hole gets cut away and the brace itself would be in the way.

Can't use the factory brace.

Any other solutions beside a tubular K-member?

modify/trim the brace?

I haven't really looked at it too closely yet, but you lose the bolt hole for the brace once you notch. Maybe weld straight to the K-member?

I have a tubular K-member that I ordered with the brackets to attach the braces ... but to fit my LS2 (GTO, stock accessories) in there I had to cut off the inner bolt stud for the brace. There is still room to make a brace using only the outside bolt, but the inside bolt is gone. I plan on making custom braces, but I haven't done it yet.
(I hope that wasn't too terribly confusing)

You may not have to do the "notch." I just pounded the section in with a 20 oz hammer where you would notch and made a big enough indention for the a/c compressor to clear. Still have factory braces installed and don't remember them being any problem. My a/c is for LT1 though so LSx a/c compressor location may be in a slightly different spot.

Hmm. How different are the compressors?