Gil, if your using the sprinkler venturi that's stock with the TD, your fuel draw is still affected. What many have done is switch the TD carb body to the Medallion carb body which in turn has a choked down throat area due to the spraybar going through the center of it. Fuel draw is compromised using a TD when your tank shape is incorrect. If your using a wide tank on a profile, this automatically places you in a lean condition due to the engine requiring to overcome centrifugal force. Getting the tank as close to the engine as possible and keeping the fuel line as short and straight as possible offers positive results. If you can fit a longer narrower tank in width is the key. Uniflow can also assist to a degree but certain tank shapes like a wedge doesn't always serve favorable using uniflow. I believe in my opinion that it can cause a lot of turbulence at the uni pipe. When mounting a tank on a profile, you can also sink the tank into the fuse by cutting out the doubler on the inboard side and also shimming out the front of the engine with a wedge. I have also jacked the spraybar assembly off of the plastic carb body using glow plug washers to help move the spraybar assembly further outboard. While glow plug washers don't appear very thick, two of them can help combined with engine offset. Unfortunately, the length of the venturi is not very long so not many threads are into the soft plastic.