I started a similar thread inquiring the same thing about Big block brackets. A few board members directed me to Alan Grove components -- he has brackets for small and big blocks (and a bunch of other crap) that works good at very reasonable prices. Sanden makes small AC compressors too, that blend in a little better under a nice truck's hood
But as far as using the stockers- i have no idea -- remove and replace is the only way i know how to wrench (unfortunately)