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I also tried a Holley 850 in place of my 750 Silver Claw and the car slowed down if you can believe that. I still don't quite understand that. With the Tunnel Ram, I run two 660 CFM Holley's and it loves it. I was just trying to keep the motor under the hood for now though.

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As you have said the 850 Holley slowed the car down, usually when you add more air and fuel to 440 Mopars they go quicker and faster, I wonder what was or is wrong with that carb? Are you able to jet the carbs, both the single and duals, up enough to slow the car MPH down in the 1/4 mile? If not, pressure is not volume, there is a reason for that(not getting it fat enough to slow the car down, lack of fuel ) If so continue on One thing most guys don't try is to put in a lower 1st gear set I've done that several times using the Mopar brand helical cut 2.77 low gears, that wakes up the beast on the starting line As long as the rear tires will hold it 2.45x4.56= 11.172 starting line ratio, 2.77x4.56= 12.631