MAP values with upgraded cam?

[95ImpySS]

I'm giving up on tuning the car my self at the moment. I don't have the time to dedicate to it and I need to upgrade my FAST wideband in order to data log. Before I take the car to the tuner I noticed my MAP values are at idle (680-725RPM) my map readings are between 0.60 and 0.75. A friend says that it should be around 0.30-0.50. I had some trouble sealing the intake to the heads. Curious if my readings are normal with a larger cam or if I have a bad MAP sensor or a vacuum leak. My mech vac gauge reads 11"-14" of vacuum at idle.

Thanks in advance.