QA1 with Big Block

Hello, i'm pretty new to the site and have learned a lot since joining up.
I have a question. Has anyone used the QA1 K member with a 440RB. I'm building a 67 Dart and the folks at QA1 said their K member only comes with small block mounts and doesn't no of anyone running a Big block with their product?. Any help would be appreciated. Thank you

Trying to run all QA1 for the front suspension