Don't be too frustrated with it. You're forcing 9-11 psi through your restrictive stock manifold and heads (and whatever headers and exhaust you are running). The whole thing works as a system. Less restriction means less heat (less boost) but more power. You're not going to get much more out of it with stock injectors, an FMU, and stock engine components. Kenne Bell will tell you the same thing.
You need to invest in a good set of heads, exhaust, injectors, mass air, TB, and most of all a tune. That will be a night and day difference from where you are right now.
1. Are you running a 160 degree thermostat in Texas? I run one here in PA. (not driven during the winter).
2. A larger radiator will do wonders to cool down your engine with that KB. I put on a Fluidyne 2 core and it runs almost too cold. I only get into normal range when I sit in traffic.
3. A hood that allows you to vent heat will also help. I have a Cervinis Cobra R and I can actually see the heat coming out of the vents in the back if I sit in traffic on a hot summer day.
4. How do you find these parts: :google2: Or pick up any mustang magazine and look at the ads.
:hammer: