Question, does a factory low mount compressor clear the K-member?
It doesn't with power steering. Bouchillon Performance swears it will fit with a manual steering box (I'm assuming if you cut the back tab off). Also, I'm pretty sure my engine mount is bolted to a rear AC bolt on the motor. I think you'd be the first to try with a Borgeson box.
Hopefully someone else can chime in.
Gdemon had to offset the factory AC Pump, as I know a few others have done as well.
I'm using a Sanden 7176 SD7B10 compressor. Pulled a vacuum on the system today, and I'm currently waiting to confirm there are no leaks. I can outline the use of that compressor if anyone is interested. The thing is TINY (and it's output is tiny as well - 100cc or 6.1 ci).