stock 2mm seals + stock corner seals dont like nitrous at all ..

On my old N/A I ran a 100shot ..

At the least get this :

550 T2 Secondaries
S-AFC
Walbro 255

I would use 680cc GSL-SE's secondaries if you can get them or 720cc ...

Also make sure you have good bottle pressure when you spray and use it wisely