Headers with crossmember type motor mounts

[62lwbc10]

Dear all I know this is a perennial question but I need some answers. I have a 58 Apache with the original steering box and a new crate 350/290 and I want to replace my ram horns with headers. I understand I need to use block hugger type headers to clear the steering box. I see there are lots of blockhuggers from various manufacturers but most have a disclaimer that they won't fit with the side-type (tubular crossmember) motor mounts, which I do have. Can anyone recommend a set of headers that will work for me? Anyone else have this setup, sbc with original steering box and side mounts and headers? It seems a company named Sanderson might make something that may work but not sure. Any help would be greatly appreciated.

Mark