It won't rev above 4500 rpm, i have to spray start it, and it idles rough.

Hello, You likely have an issue with your fuel pump, filter, pressure pressure regulator, or throttle body. It sounds vague, but this is just to let you know the issue is tied to the fuel delivery system - most likely. Pressure test the fuel line at the engine. Look for: 1. How long does it take to reach maximum pressure 2. what is maximum pressure 3. when the fuel pump is turned off (key off) does the pressure bleed down/how fast These will give you a clue what is happening. Also, if the fuel filter has not been replaced in accordance with the factory specified maintenance schedule, replace it. Even if that does not correct the issue, you still have to maintain these older vehicles or they will quit on you.