[V]

my car has 2 cables to the TB, i have cruise and traction control.

but back to your topic.

setting up a true DBW TB isnt that hard. You would need to start off with a ls1/ls6 oem Corvette TB. That would have the original stepper motor intact still. They have a TPS sensor, so it appears the computer doesnt care much about the gas pedal input, for engine use other than how it would correct for traction control. In an older application, i doubt you'd be retaining a traction control function, so this shouldnt be an issue. Basically youd install the TB like normal and wire the stepper motor to some type of switch worked by the gas pedal. You could try to see how the vette is done and maybe obtain a pedal and sensor/switch. Or, find a vette, unplug the tb stepper motor(if possible) and use a volt meter to test for voltage at no throttle and full throttle. with those number you could in theory build a switch worked by the gas pedal utilizing a potentiometer to work between the 2 voltages you recorded. It could be done off a small arm directly attached to the pedal or a very short, say 6" throttle cable kept under the dash, hooked up to the custom switch. I'd suggest trying to obtain a corvette pedal setup though, would be easier and more durable.