I am upgrading the ignition on my 66 6cly 200 to electronic but there are two choices for the Petronix Ignitor. It depends on whether I have a thermactor on the engine or not. I have no idea how to tell - help?
I don't know why it would matter but the thermactor pump is located on the alternator side. It will either be above or below the alternator and have a belt running to it. I didn't think any 66 cars had them but maybe in California.
the thermactor is a large belt-driven pump for your emission control equipment. On my 289 it's on the upper right side of the engine. You can't miss it.