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To add a few things to what has been said above:
Vacuum on a street port is generally a little lower than on a stock engine. When you check compression, the Mazda compression tolerances are based off engine RPM's being 250.
If compression checks out, I would look into your throttle body and components. As for your symptom where it stalls when you pull in the clutch while in 1st gear, check out your dash pot on your throttle body. They are known to go bad and cause this problem. Do you run a PFC? If you do, I can give you some pointers to help with this problem. As for your idle being high, I would also ensure everything is set correctly on your throttle body, not just your idle adjustment screw. Street ports tend to need to idle a little higher to smooth out opposed to a stock engine though, so that might be normal.
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