Think about this;
-With bolt-ons/ins and $2000, what can you achieve? Say 15%? Say 20%....So how does that translate to your ride? Well, If you start with 140 hp, then add 20%, you get 168hp.
If you are working on a 3000 plus car, you have increased the performance from 21.4 pounds per hp, to 17.9.Now consider; that the extra hp comes at the top of the rev range; 54mph at 4500rpm,at the top of first gear with 2.73s
-But suppose you found 40hp;with a cam-kit,headers, a 4bbl, and a bump in compression.Cuz that's all you have to work with,right? So now you are up to 180hp, and you are down to 16.7pounds per hp. And now you have given up low rpm performance, cuz that's how it works.
-There is just 3 ways to make more power; rpm, cid, or supercharging. And if you choose rpm; you always trade away low rpm for high rpm
So my recommendation is gears and a tune up.And maybe an exhaust,Just as 273 said.
