Even if those factory heads are not cracked, I personally would not spend a bunch of money paying someone to port them. The cost versus benefit depends on your goals, but by the time you get a valve job, spring and retainer kit, and pay to have someone port them, you could probably by new Edelbrock aluminum castings and be close to the same performance, but with room to grow with the Edelbrocks. Not trying to bash the factory heads, just my opinion on the cost. If 400hp or less is your goal, a good valve job on stock heads will get you there, if the seats and valves are not too far gone. Even with low mileage, the seats on those heads and the valve faces get pretty chewed up.
