More questions in order to answer your question:
1) Accelerator cable - that's easy.
2) Engine gaskets - which ones and why? Your rocker cover gaskets because they leak oil? What's the problem and we can probably help you find the solution.
3) Overheating - does it overheat on the highway, or only in traffic, or both?
If your car overheats on the highway then your problem is more complicated. It could be your radiator isn't working properly. It could be a stuck thermostat. It could be timing.
Many people have a problem in traffic, which means that if sufficient airflow reaches your radiator then you don't have a problem. But when stopped in traffic, the only airflow comes from the fans. This implies that your fans are not up to the task of generating sufficient airflow to keep your radiator (and engine) cool.