Quote:

Some '70 engines had a distributor retard solenoid. It connected to a "run" ignition source, and the second wire hooked to a switch contact on the carb. When the carb was at "curb idle" (warmed up) the switch on the carb would activate the solenoid and retard the timing at idle--for emission control.



Now this is making sense. We just assumed that it was for the tach, but the more I thought about it why would the tach be attached to the vacuum pod/advance.

Ya, I was just telling him this morning that we need to get a picture of them and post it. I'm trying to search the net for a picture now, but........

Moparlee