Only mod I've found so far is the Dyno Tech stage 3 chip. No adjustable rod, stock injectors and the boost is pegging the stock gauge. I would take any recommendations as far as the fuel pump upgrade part number. Again, I just purchased the car and am new to all this info. I did have two new grand nationals back in the 80's but they were never modified. I'm learning a ton from you guys, I just don't want to hurt the motor.