Getting back into Z's.

My old friends,
Well, I am considering getting back into Z cars after a one year hyadus. Trouble is, as a student I kind of need a reliable, efficient car. I basically have all summer to build something that’ll last the school year (and then i can improve it next summer). I’ve already had a Z31 Turbo, a 280ZXT, and a 78 280Z. I’d like to get another 78 with a five speed, a crapped out engine, but minimal rust (not too hard to find in Arizona and New Mexico, where I live). I figure I can pick one up for $500.
I made a list of modifications and repairs that I would want to do. If you guys could look it over, tell me how accurate you think it is, and if you think I’ve left anthing out, I would really apreciate it.
Engine:
280ZXT Engine/ ECU and Harness- 500.00
New (or Serviced) injectors- 100.00
New Clutch 150.00
Intercooler (Probe etc...)- 100.00
Exhaust sytem- 100.00
Acc. (air filter, sensors, boost controller, etc...) 200.00

Suspension :
Shocks (Tokiko) 484.00
Springs 250.00
Bushings 250.00
Anti-Roll Bars 250.00
New Alignment 100.00

Cosmetic :
Paint/ Bodywork 500.00
Rear Apron 100.00
Front Spoiler 100.00
Headlights (Diamond+ covers) 100.00
Seats (Miata, Porsche etc...) 50.00
Carpet 100.00
Dash Cap 100.00
Steering Wheel 100.00
Windshield (most are cracked) 100.00
Window Tint 100.00
Uphostery material interior 50.00
Weather stripping ???????
Stereo 250.00
I can do almost all the work myself.
Anyway, let me know what you all think.
I didn’t include wheels or tires in the list, because the prices can vary so much.
A few questions about the Turbo Engine:
1. I believe that the 1982+ electrical system is better, is that right?
2. 78 tranny will work fine?
3. As far as swapping for zx rear discs and axels: how complicated is that, and how beneficial?

Thanks,
Dylan Wood