Where is "here"? You need to update your location in your profile anyways, but by all means enlighten us as to where you're at.
I want to do the same thing with my KA24DE.. I need to get all the A/C crap that goes in the dash, and run the hoses through the firewall. My S12 never had A/C, so there are rubber grommets plugging the holes in the firewall.