You will need the correct throttle cable for your LS1 swap, Cut to fit cable.
Lokar Carburetor Accelerator Cable WCA-1041; Replacement Inner Cable 36 in. SS
Lokar Carburetor Accelerator Cable Replacement Inner Throttle Cable 36 in. SS
Lokar XTC-1000TP36 Hi-Tech Throttle Cable Kit; Fits w/Tuned-Port; 36 in.
Lokar TC-1000EFI36 Hi-Tech Throttle Cable Kit U-Cut-To-Fit 36 in.
Lokar Carb Accelerator Cable XTC-1000HT36; U-Cut-To-Fit Black Braided 36 in.