Big Block K Frame Identification

No, there is no conversion for the early k-members. Best I could do is make a template and see if I could make your slant k-member work, but I haven't modified one so I'm not 100% sure it would work. It wouldn't be just a cut and move job and would be $100 more if successful.

I have seen where somebody took B/C/E body brackets and put them on an A-body k-member, but without a car to mess with the location would be a guess.