My truck has had a Ford YF on it since the previous owner. I never knew it was calibrated too rich, I have always had good luck with it. Not saying its mixture is right but it runs well and I usually have to run with the choke slightly closed to solve the off-idle stumble. I had also looked at the Daytona one-barrel adjustable carbs but my thought was, "if it ain't broke, don't fix it".
