Stock 99-02 GM V8 GMT800 Truck Cable works perfectly fine, been in my SS for 9 years or so..
My '84 Monte has an '04 LM7 (5.3L truck) that was drive by wire; I converted it to drive by cable using a '00 DBC harness/ECU and a throttle body from a LS1 Trans Am. If I LS swap the '78 cutlass, I'll make it a highway car. I'm thinking 3.08 or 3.23 gears on 28-spline 7.625" TruTrac, 4L60e (6L50e?) and L20 (4.8L Gen4 w/exhaust-side VVT). The commuter cars I own (2016 Chrysler T&C, 2015 Jeep Renegade) have drive-by-wire and it REALLY pisses me off when my foot on the pedal (throttle position) tends to be a suggestion to the ECU. I want my brain to tell my foot the throttle position; I don't want my brain to tell my foot to ask the ECU [nicely] to achieve that throttle position at its leisure.
Thanks for your interest and contributions to this post, folks. To restate/refine the original question: what are my options for converting Gen4 LS to drive by cable? I do not want to bolt an electric pedal into the g-body. I want to use the g-body gas pedal with a cable to a LS1 or aftermarket throttle body bolted onto a Gen4 engine that only came with drive-by-wire throttle. I expect I can't use a LS1 computer with the Gen4 4.8L. Do I have to use a Holley or MegaSquirt ECU to use drive-by-cable on Gen4 with fuel injection?
Carbs on Gen4 with VVT is definitely LOL (special kind of retarded).
I'm aware there are numerous options for the cable itself; I'm using a pricy Lokar variant because the F-body cable was out of stock when I did the swap in 2020 when the supply chain was sitting on the couch collecting free money.
The point here is that I get about 15 MPG on the highway with the 5.3L and 3.42 gears. I know everybody says they get 20 MPG on the highway, driving to the dragstrip in their super-boosted LS-swapped g-body with 4.11 gears and 100#/hr snake-eater injectors, but I call BS to the highest level on those claims. I use the trip odometer and divide by the gallons on my gas station receipt and it isn't ever over 15 MPG driving @ 75 MPH. I expect the cutlass brick will be closer to 20MPG with the smaller stroke 4.8L and taller gears.