2100 Carburetor

[arnie123]

Hi all, I have a problem I hope somebody here can help with. While I don't have a jeep, i do have a carburetor that I read about here that is giving me fits! I have a 72 Ford 302 motor set up with a Motorcraft 2100 The venturies say 289 on them, and the body is 1.14. This motor had a 1 1/4 exhaust cross over into a single 1 1/2 exhaust. I took that off and installed dual 2 1/4 exhaust into Dyna Flo mufflers. This motor is brand new (rebuilt 900 miles ago) is stock except for Pertronix Ignitor II ignition, and their Flame Thrower coil. The problem is that the motor is running lean, and getting hot. I put a kit in the carb, but it didn't help. The jets were #47, I upgraded them to #49 just because I had them but it didn't make much of a difference. I put a new 4 inch vacuum gauge on the PCV valve port on the carb spacer. At an idle either hot or cold the gauge is showing 19-20 inches of vacuum. My question is. Because the engine is breathing easier now. Should I up-size the jets, and if so how big of a change should I make?