just bought a 350 th350 swapped 80 Camaro now. I am having an issue with the carburetor. It starts and runs good as long as I don't give it more then half throttle it runs ok. when I give it more then half throttle it once it idles at 2500 rpm. If I shut the car off and start it back up it idles fine again. I replaced the throttle springs cause they were stretched pretty bad... It has a holly with an electronic choke. someone just wired the choke open...