Here ya go Ignore the small 2nd return spring in the picture. I may have young people driving the car who are inexperienced on what to do if a throttle gets stuck so I put it on as a back-up. That's just me being a " Paranoid Dad".
I put a 2nd return spring inside the normal one, as the OEM spring has a pretty large diameter. I don't think I'm paranoid. When I bought the car, it had an Edelbrock on it that the previous owner had invented throttle linkage to fit. It would sometimes stick at WOT, and it was not the kind of driving excitement I look for in my cars. No passengers at the time ever asked for a second ride.