NA Tune + Nitrous......possible?

I have an NA tune from Madz28.com and I assume he advanced the timing quite a bit, and it is tuned for use with 93 premium gas. I was wondering if I use all the proper equipment for my Nitrous....would it be possible to spray a 75 shot with out seeing detonation....or possibly higher with the use of race gas? Eventually when I get the funds I am gonna get a Mallory ignition box to retard the timing when I hit the spray, but for the time being is it safe or no?

I am spraying on a madz28 tune as well. Granted, I pulled 2 degrees on a 75 shot and 4 on a 150 with the Mallory box. If you use race gas, you should be fine.