Upgrades are usually done in stages. Each level will provide more performance than the one before it. However, they will also be more involved and expensive. The first upgrade we recommend is tuning the computer. This involves changing the fuel and ignition curves to optimize performance. A good tune can gain up to 40 hp on a stock engine. (Any significant upgrade will require re-tuning the computer.)
The Stock final was an E/SA heads-up competition that pitted Larry Gilley and his ’69 Dodge Dart against Ryan Mangus in his ’70 Camaro. Gilley launched off the starting line in .009-second to Mangus’ .012 start to initiate a thrilling race. Gilley got there first with a 10.627, 121.27 win over a 10.664, 122.73.
I have a 1985 Camaro IROC-Z with a 305 Tuned Port Injection (TPI) engine, 700-R4 transmission, and 3.23 rear axle gears. I plan to buy a 350 crate engine that has been dyno’d at 350 horsepower and 389 foot-pounds of torque with a carburetor.
Your TPI and exhaust modifications should help performance, but don’t get so carried away that you give up everyday reliability. You should be able to hit the 350 hp mark with the computer and custom-burned chip. If you change fuel injectors, start with 22 lb./hr. units and go up only if top-end performance dictates more fuel.