Originally Posted by 87 T TOP GT302
Every Mustang is different but with mine it seemed like it needed more fuel .It wasn't bogging but when I nailed it seemed to need more fuel. Lean may not be the best way to describe the condition. All I know is with the 24 it just runs better especially at full throttle.
Obviously your issue is more related to having a lumpy cam. SD cars are prone to idle, fuel ratio and drivability issues with aftermarket cams.
Your cam choice is not to bad , but it still lowers your vacuum quite a bit and the MAP sensor is seeing this low vacuum.
You could gain so much more out of your setup by converting to MAF. I suspect your low end throttle response leaves a little to be desired, but once you hit WOT she screams like a banshee.
The op is not swapping out cams so the stock 19s should suffice .