Good Day, I have a 67 with the holley 1bbl that was sitting for about 20 or so tears. The person i bought it from took out the tank and ran a chain inside to break up varnish then steamed it. It runs ok with the choke but after it warms up it will only run with slight pressure on the throttle. Will not idle. I replaced everything from a kit and throughly cleaned all holes and parts also I put 2 inline filters to make sure fuel was being cleaned. Its a little better but same issue also sounds like a miss when running. No vacuum leaks. Starts right up just wont idle. Hard to drive with 2 feet. Appreciate any help. Thanks.