I have the car on the road and running good all summer. My question is is how do you have your Holley set up for good performance and the best mileage possible. I know every engine setup is different, just want to know what is working best for you? In my 69 Road Runner, I have a rebuilt 440 (30 over) with 9.5 compression,flat top zero decked forged pistons, rebuilt iron 906 heads, and a comp cam 268 xe cam, stock iron intake, and a Holley 4150 750 cfm double pumper with mechanical secondaries. I am hooked up to a 727 trans, and rear with 3:55 gears. My carb is set up like this: jet primary side 74 jet secondary side 80, pump nozzle primary side 35, secondary side 31, power valve on primary side 5.5 secondary side blocked off. Running a new fuel tank and 3/8 fuel line. Thanks