The throttle cable needs some mods to work. First is the throttle body side.
You need to cut off both the rubber piece, and the metal bushing that slides in to it.
Once those are out of the way, it bolts right up.
With this done, you quickly realize the cable is about 3 inches too long, and you really only have about +/- 3/4″ adjustment. This is caused by the mounting point being closer to the Acura throttle body than the Miata throttle body.
Unless you have the skills to do the fancy barrel cable ends like used at the throttle body end, you need to shorten the cable from the peddle end. This means you first need to remove it from the car, which is a real pain. The stupid firewall clip is my worst enemy. It may be marginally easier with the dash out, but I have reistalled the dash twice so I was not going there. The only advice I can give is letting you know that there are 4 clipping points that need to be compressed at once, all from the inside of the car. 2 on top that you push down and 2 on bottom that you push up.
Once out, I cut off the amount needed and followed a writeup I found on line for making a new solder ball. It involved first sticking the old ball into playdough to make a mold.
It was then removed and the cable was slid in to place.
No pictures of the solder melt because I don’t have enough hands, but I basically filled the hole with liquid flux and then hit it with a torch while feeding 5050 lead solder in. In the writeup I was following, it said the playdough wouldn’t burn, but mine looked like a toasted marshmallow in seconds. Might be because I was using a hotter torch? Regardless, it worked.
After a little cleanup on the grinder, the ball fit right in to the plastic retainer. It also is on there very securely.
A few minutes later it was in the car and working perfectly, and I was off to the next item on my list.