OK, just to let you know I am still at it

I am almost ready to open up the type4, this engine was a good runner but is laying around for 15 yrs. I want to open it, clean it and replace Watt needs to be replaced.
the car is build for a Nitrous system with 2 fuel systems and all the safety's and switches. I was thinking of a 30 to 50 shot of nitrous, can someone tel me if I need to change something in the engine?
bigger pistonring gaps?
lower compression ratio?
etc....
Here's a pic of the brakecooling I am working on.
Thanks, Paul.
https://www.facebook.com/Vwrankenstein-Ovaal-109015887687050/