As long as a properly sized jet(s), brand name reliable pump, and safety switch is installed, you will have zero problems. Most well known water/alky/meth kits will provide everything you need for a simple and safe setup.
If you're going to use meth, purchase a kit that is designed for it. You can use alky with a basic water injection kit but you will have to lube the o-rings in the pump with petroleum jelly, or mix a little Klotz UpLon fuel lube in your water/meth tank. If you don't do either of these things, the alky will make the rings swell up.
Most people use a 50-50 mix of water/meth. Where can you find a 50-50 mix? In a bottle of windshield washer fluid. Prestone De-Icer Windshield Fluid is said to be the best, because it doesn't have the additives/crap as other windshield fluids do. Or you can be a MAN, and run straight denatured alcohol!! It can be found under the name SLX at Home Depot.
