[duderiffic]

I know that Harada (antenna company) makes an internal antenna that works pretty well (I've owned one before) I dunno what the part number is but it should be avialable through your local stereo store. I think cost on it was around $10 or $15 so don't pay more than $30 for it. Once again it works pretty well... I had it on another vehicle I'd owned previous with a shaved antenna.

To get rid of your door handles you'll need a solenoid and some type of remote control system (I'd recommend just buying an alarm) as far as the body work I wouldn't try and replicate that tight S14 line on your first pass at body work. Any quasi-custom body shop should do it for you for under $500. (hopefully way less) (of course assuming primer finish)