This link shows you what you can do with the engine in your car.
I would consider this useful if you have a numbers matching engine in your car.
http://www.hotrod.com/how-to/engine/hppp-0712-small-bore-pontiac-engine-build/
What kind of budget are you working with? have you ever rebuilt any engine?
Do you have the tools and clean enough environment for taking on such a task?
If you have the budget but not the tools, I would suggest purchasing a Long block.
Get what is within your budget from Butler
http://www.butlerperformance.com/products/engines_assemblies.html
Just a reminder, Having a large HP and torque motor is great, yet all this is for nothing if you cannot hook the car up.
When you have a highly modified high HP Pontiac engine you will have no problem smoking the tires, spitting out u=joints and wrecking your differential.
My point is nearly every thing in the drive train on your car will need to be modified or replaced.
Once the car hooks up from all the mods you will continue to find the week links in the car.
My point is power and speed cost so much more money and time than most people think about.
Before you start plucking parts off your car in hopes of showing up your friends, ask yourself if you still plan on owning this car is 20 years.
Also ask yourself how much are you going to want to drive this car and what type of driving will you be doing with it.
Fuel is pretty inexpensive right now, but even with the low prices, a high power Pontiac engine can pretty much drain your wallet much faster think just in fuel cost.
