[old51sedan]

Originally Posted by 67carry-all

A little help from the HEI gurus, please. 292, swapped in a junkyard HEI from '79 Camaro years ago. Truck has run fine this way for years, but centrifugal advance was working poorly. This weekend, ot a new HEI from one of the local well-known auto parts stores installed. Installed fine, test drove a couple miles, also fine. Next day, hooked up an Autometer Tach (was not hooked up to the prior HEI dizzy), test drove, ignition died after 1/2 mile. There is still 12V to the Batt terminal, coil seems to test ok. Tach was reading accurately until the ignition died.

I vaguely remember a note in one of the HEI discussions where a tach could cause an issue, but can't remember in what way; the connection seems pretty straight forward. Just a bad new distributor? Any ideas on what happened?

Is this tack strictly an 8 cyclinder tack or does it have a switch to set it to a 6 cylinder tack?