Dwayne is one of the most respected head Porters and engine builders on thsi site and one of a handful on here that I would never hesitate to recommend. When I recieved my Stage VI Chapman Max Wedge heads and wanted to know the "real skinny" on what I had I knew I could count on Dwayne to give me an Honest an objective technical evaluation, and he did.

Generally every 4 cfm of intake you gain throughout your cam/port flow window is worth 1 hp PER cylinder, provided your induction and exhaust system is capable of delivering the proportional increase in Air/fuel demand needed to achieve it. If I recall correctly the PRH Stage 2 on a BB Eddie should deliver at least 30-35 more CFM through the most critical mid-lift flows (where the valve spends 1/2 it's time), so in rough numbers that's about 65-70 more HP potential all else being equal.

The effect of a good port job is very similar to the difference in a flat tappet vs a roller of the same relative seat timing and lift...only more so. You are effectively allowing the motor to increase it's VE (torque and as a result HP and upper RPM breathing) but without negatively impacting the lower end of the powerband. It's a win-win and furthermore, Dwayne is one of hte best at tailoring the port work to the specific flow characteristics of the cam and the converter/gearing/vehicle weight of the rest of the combination.

bottom line...you can't go wrong with PRH