NA_Goodness

OK, so I have been talking about this for a while and I've finally brought it home!! About time too... Picked it up for $2k, and started work on it this afternoon.
Plan is:
RB25DET motor and gearbox
6Boost manifold
Garrett GT35R with 0.82 rear housing
GReddy plenum
Cams
Bosch 1000cc injectors
PWR intercooler
PWR radiator
Haltech ECU
Haltech dash
Complete Driftworks catalog of suspension parts
R33 GT-R Brembo calipers
Upgraded disks
R33 GTS-t handbrake
Origin body kit
Z-Tune bonnet
18in ROTA street tires
17in TE37 track tires
Cheapest skid tires I can find... Its gonna go through a lot of them
The end result should be a nice 450-500hp, with some handling and street presence to go with it. Should be good fun! Obviously there is soooooo many more parts, but that is just a quick list. I will list the rest when I get a bit more time.
Anyway, here are the pictures of how I picked her up...
On the trailer, about to come home:













Whats the best part? It's still registered



Ok, now I need some help deciding a few things. First of all, the aircon.
I need to remove it to put some new carpet in it. Should I just ditch it while its out, or put it back in and try to get it working? Most people would be thinking "No aircon? Thats unheard of!!", but in the 2 years I had my R33, I used it 3 times. It just isnt something I rely on, in any of my cars. Although It would be nice to have... The other issue is weight. The RB25 is heavier motor, but if I ditched the aircon, sound deadening, everything in the boot, and all the airbag junk it might even up the extra weight I'm putting into it. Maybe...
Ideas? Questions? Funds? I'll accept them all $