Iím going to be serious now.
Alrght dude, I know your new because the question you just asked is one of the noobiest Iíve seen in awhile. You want to make your 4 banger run with the big boys and that man, is a lot of work. You want a V8, Iíd go with a Cobra small block 4.6L V8. If you get a new engine, your also going to need to get a new transmission. To install of this it is going to involve cutting in to your firewall probably and you might find it more work then you really want to do and itíll cost you a bundle for the parts.
Now youíll need new racing gears and pullies for your engine. Your gears should be 4.10, and I donít know about the pullies, Iíll get back with you on that. Your exhaust will need to be modified as well, I say flowmaster works the best but personally, thatís just me. Your also going to need cold air intake, I prefer the K&N Typhoon system myself.
You want to run with the big boys? Well then you need a charger, super or turbo. I prefer Twin Turbo but a supercharger works just as well. These myfriend ainít cheap.
That my friend isnít even all of it. Once we get some other opinions, Iíll post more.