Congrats on your score..
#1 important with NOS is fuel.. lack of or improper mix will melt parts FAST !

1. i only want to run a 75-100 shot. really dont want to hit the car that hard. can i tune this system for that small of a shot?
Yes, there should be replaceable orfice jets where the line goes into the plate, check the NOS website for proper jet sizes.

2. how can i verify the components are working and working properly before i break something?
cycle the solenoids without being hooked up to the plate.. NEVER shoot nitrous in a motor that is not running..or BOOM when you start it..

3. the braided lines between the solenoids and the plate are exactly the same length. how important is that? id like to mount both the solenoids behind the carb under my air cleaner for cleaner looks
Should be no problem.

4. my holley blue pump and regulator combo has another outletport that is currently not being used. can i use that to feed the fuel solenoid?
yes, be sure to have a gauge to determine proper fuel pressure while spraying the motor..

5. any good articles and websites that would help me get up to speed on this before i start to install, other than mounting the plate when i get done putting the choke back in my carb?
Check the NOS website..
Have fun..