Saying the car still runs is being very generous

I managed to drive the car across town to my house, about 6 miles. Over about 3000RPM's the car stutters and has no power.
I did a quick boost leak test. The car dosn't have a aftermarket boost gauge on it, so it was somewhat difficult to tell how much it held. However it didn't appear to be leaking enogh to cause it to run as it is. I have already ordered the new caps. I figured they were only about $4 shipped so I will try them first.