coil over suspension with stock K

Let me add to why I'm asking such a question....I have this idea running bouncing around of building a corvette slayer for under 10 grand. I completely restored my duster around 12-13 years ago. And including the price of the car, I have right around 6g invested into the car. So now I kind of want to play a numbers game and see if it's possible to build an engine and suspension set up that can consistently beat a corvette at auto-x. That would leave me 4 grand to play with. which I'm thinking half of that would need to be allocated for minor engine upgrades.