To me if you have a cable throttle cable you will need a stop for your gas pedal as it is only a matter of time before the cable breaks. If your throttle is a rod than you will be okay. I have a factory throttle cable on my car and had to add small piece of flat metal between the end of the cable and the carb for it to reach. I made the flat piece about 2 inches longer than needed and drilled extra holes in it so I can shorten the cable thus preventing full throttle to help slow the car down. I haven't gotten to use it yet, and it won't be as precise to dial in for an ET like the bolt and nut, but will help slow the car down a X given amount.