[fastd]

Rodknock is correct - the one that was recommended was the 4150 HP Series, a race carb (whatever that means). I called Holley tech service; they said the difference was better flow, open venturi, and changable airbleeds, resulting in much better low end response.

The current carb that is on my engine now is the 4160 HP 750. The problem I am having is that the secondaries aren't opening properly; my tuner opened them manually one time and that's when we got the 314 hp and 296 torque readings (up 12 hp and 28 ft-lbs). From what I have read, the mechanical secondaries are better suited to a lighter car with manual trans, that doesn't mind the "kick". I will definitely go with the HP series and spend the extra money.