I know that it was mentioned below about turning a non lightning into a lightning, but i just wanted to know, what would be the first thing to do, if i were to turn my 2001 F-150 stepside into a lightning? i know i have to have the holy grail of ford engines, body kit, exhaust, interior seats, wheels/tires. Is there anything i am forgetting? How much would it cost for each of these upgrades?

I am a highschooler, so price is definetly a factor, sorry i cant just drop $25,000 on a truck. i was looking to spend around $4000 engine, $1000 bodykit, $300 exhaust, $2000 interior, $1500 wheel/tire. does this seem about right?
Any info, will be greatly appreciated