Hi Tracy - sounds like your doing your homework. That's a good thing. The 795 cfm's were installed on alot of small blocks and other GM motors. Here is another test to check your secondarys. Start the motor and bring up to operating temp. This going to check the spring tension on the top blades. When up to operating temp bring the engine up to about 1500 rpm then rap the thottle to WOP (wide open position) you should see the upper blades partially open. If they don't your spring tension is to tight or your secondary metering rods and or the cam that they are attached to are hanging up. To lighten the tension of the blades. Remove the carb (you can do this with the carb on the engine but it requires the use of a small mirror) and on the left rear of the carb as your standing in front of the vehicle turn upside down and you will see a small allen screw stop and a spring also on the side of the air horn castin where the screw and spring are located there is a another straight slot screw this screw applies or takes away the spring tension. unloosen the allen screw and turn the flat head screw clockwise to increase of counterclockwise to decrease it. One other thing make sure you put a vacum gauge on the manifold side of the engine which a port that is blow the thottle blades. You should have 18 - 20 inches of vacum. Then put it on the port side of the Carb. This port(s) are above the thottle blades. Normally to distributor vacum advance. You should have 0 vacum at idle and when you rap the thottle vacum should increase and climb. Your on the right track don't give up. Hope this will help. Signed GM dealership tech retired after 32 years. J.B.