Vent temp on my '87 with barrier hoses and R134a...
Kickass AC is the ULTIMATE luxury on a G Body 911. Thankfully, some PO did the upgrade. That's for the wife friendly car though.
Per this thread,
http://forums.pelicanparts.com/porsche-911-technical-forum/423361-438-lbs-gone-5-days-my-build-story.html, the entirety of the AC system weighs 58.08 lbs.
On my wife unfriendly '89, I pulled the AC. Looks and feels good to be rid of that crap (heater delete too). I may go the electric AC route down the road.
Consider...
A) Bringing the car to Steve's D&S Auto Air in Costa Mesa and getting an estimate for a killer AC system. My guess is it'll be ~$5,000.
B) Pull everything out, but the AC evaporator fan. That can still be used as a fresh air fan for the dash vents.
C) Pull everything out, including the center console. Lose over 60 pounds as a result. Sell the center console to me. ;-)