Is this cam to much for a stock engine?

I run a Isky E-75 in a otherwise stone stock 361 Bog Block with Headers, and a 3-Inch exhaust.. I run a four speed and 2.76:1 gears, and it my family/daily driver:
Cam Specs:
Advertised Duration: 320-Degrees
Duration @.050": 274-Degrees
Lift @ Valve: .570"
Lobe Separation: 108-Degree

The car is alittle sluggish on the bottom end, but after the roughness goes away after 2800-rpm's the car hauls.. The mid-top end charge is unsurpassed.
I had a Isky 280 Mega Cam in the car prior and it was way to small... For me anyways.