You should be fine. Just take your time on the install an keep any an all Sniper wiring away from the plug wires, coil and alternator wiring. Make sure you have good grounds everywhere. Make good connections, power an ground straight to the battery. An for gods sake read the instructions and the tuning manual you have to download from the holley website. 90% of the questions an complaints I see could be solved by spending 20 mins reading the manuals.
I'm not knocking anyone that had problems in particular. They have a right to be upset as the system isn't cheap at all. They are ones that your going to hear from though as those of us that are running it without problems are happy with it an don't have much to say about it except that it works and it works damn good...