No, I don't think the cam would be too much. When you had the heads re-built, what springs did you use? You would want to make sure that the rockers and cam don't give you to much lift for the springs. Other than that, P-heads are great heads. They flow really well and I don't see any problems with those and your combo. What intake are you running? Stock?

I ran the 255lph pump with similar mods and the pump was fine. The only thing I would suggest is an Adjustable Fuel Pressure regulator, so you adjust the pressure. If it is a little fat, you can tune it back down.

Last thing I would say is this... Take it to a dyno and get it tuned!! If the car is rich, you will lose HP. There are several good dynos in the area and it will depend on where you would want to go. I will throw a plug for Coastal Dyno in here, just because I have had good experience with them!