I'm actually pretty extensively modded. All in all the mostly full list from stock is, Headers, Intake, Cam, Valve springs, modded retainers, Lifters, Fuel pump, pump rewire, injectors, tune (i bought a tuner and do it myself, this alone is pretty complicated), E85, Gauges (about 300+ just in these), transgo kit for the transmission and a sh1t ton of maintenance. It wasn't all done in a week, but it was all done by me. So depending on your level of mechanic skill, you need to choose wisely.