EG33 would be unique, and hard to swallow for the community to see something different from WRX or STi swaps. I seen a Legacy (1st gen I think) with an EG33 swap. I was going to do the swap myself.
Your BK is the same as a BG. Only difference a BG has a raised roof and maybe more options. You need top hats, struts and springs to swap in. That's thr problem with info that's "borrowed" it's incomplete, you need to check the source.