These guys got it right.
But before you do a thing, you need to do a compression test at the minimum to be sure your motor is healthy enough.
A 35 DRY shot is on the limit, your going to want to pull just a bit of timing (retard it). And you will want to run premium fuel. Might I also recommend a set of iridium plugs and a good check of your ignition system.
I would also look into a wet shot if I were you. ZEX is by far the best company to get a kit from. There all in one unit has everything you need in it. But a wet shot is not only safer, but it also delivers a much more potent punch. Take it from me, I used to run a 75 wet shot with the ZEX kit on a otherwise stock (power wise) LS. I retarded the timing, added iridium plugs, a walbro 255lph hp fuel pump, and a slight boost in base fuel pressure to be safe. Never had an issue and the car pulled quite strong, only down side I came across was the cost of N2O. I had a 20lb bottle and was cutting though it every 1.5 weeks. Not cheap....