My ignition timing is going crazy, very unstable

I'd be suspecting something in the dist is wrong, or the plastic drive gear is AFU

You have a shop manual? Download a 66 manual for free here:

http://www.mymopar.com/downloads/servicemanuals/1966_Plymouth_Service_Manual.zip






A photo of the bottom showing the clamp bolt


Thanks, I have the '66 Shop manual.

I agree with you, I think something is loose/worn in the distrubutor. Oh well... time to upgrade to HEI i guess...

Syed