Fuel System Setup Help

Hi all, I just bought a Chevy motor 570 cubic inch with a Whipple R980 blower.

It has an Enderle 1200 fuel pump.

Got an overdrive of 36% and is going to drop to 12% .

What jetting needs to be done to the fuel system when using a 12% overdrive ? It will be very rich as it is.

hat nozzles 4 x 0.073

port 1 0.061 port 2 0.064
port 3 0.065 port 4 0.063
port 5 0.066 port 6 0.074
port 7 0.066 port 8 0.063

as it is .

 

Any Help Please.