Installed a raised crossmember...now what

[2wd73blazer]

I have installed a raised crossmember on my 72. I have a BBC to install when I get to that stage. I have a couple of questions. What headers do you run with this setup? I have long tube Hooker headers I bought before I decided to lay frame but I think they will stick out below the frame. My second question is about a/c. I have a a/c cab but my tires are 28.5 inches tall. I believe I read on here that if your tires were over 28 then they would hit the a/c housing. Do I need to run vintage air or some other aftermarket a/c unit? If I need to run aftermarket a/c then do you have to run the a/c compressor that comes with it? I have a gmpp bbc serpentine system I was planing on using.