You have a couple options at this point. Aside from total carb rebuild, get a can of carb dip, tear down the carb and dip the parts in the cleaner per the instructions on the can. One of our old tricks when we suspected a clogged orifice in a carb, (assuming the fuel pump is good, there's no crushed hard line between the tank and the pump and the pickup screen in the tank isn't clogged) get the engine started with the air cleaner off, then rev the engine up from the throttle on the side of the carb. As soon as you get the RPMs up, snap a flat hand palm over the intake tightly for a second with the throttle wide open and use the engine's vacume to suck any clog out of the metering orifices. Leave the throttle open till the RPMs start to come back up and the exhaust smoke clears. You may need to do it a couple times and then try a test drive and see if that cures the problem. If this doesn't change things, try taking the gas cap off and put an air blower to the line from the pump to the tank and see if it blows through to the tank. If you put air to it for a few seconds, pull the air blower from the line and the air pressure comes out of the line back at you, get her up on jack stands and visually inspect the hard line from the fuel pump end to the tank. WEAR SAFETY GLASSES WHEN YOU DO THIS SO YOU DON'T GET A GASOLINE EYEWASH! (no fun at all) I had a 68 mustang years ago that would run great for about a block and then fall on it's face. I changed the fuel pump twice, rebuilt the carb twice and no change. Finally I got under the car and inspected the fuel line. The problem was the hard line had a 1/4 inch crushed spot right under the driver's seat. (steep driveway skirt or high speedbump). I cut the crushed spot out, replaced it with a piece of rubber hose and secured the line back up on the inside of the frame rail and the problem was solved. I hope this helps, and good luck!
If you have any questions about any of the steps I described, PM me and I'll help with any advise I can give.
![Driver :driver: :driver:](https://www.steelsoldiers.com/images/smilies/driver.gif)