What I would like in a stage II:
a/c just to keep the stock look
dont care about cruise control
would prefer no cage but seems unlikely since most were built to run at the track
I would probably never track the car. I grew up in an era around the Phila area where there were some really fast GN's for the time and they were street driven. I would not race on the street, but love to have too much if you understand.
With this being what you want I personally would not waste my money going stage 2.
I could build a 109 motored car to run bottom 10s-high 9s reliably.
this would save time and money.
You will be spending quite a bit to do this and making a quote would be real difficult.
Let me know if I can help