Join Date: Dec 2000
Location: Monroe, WA, USA
sound's like the old vacuum advance was hung and it left the advance part of the carb about 14* advanced. after you swaped in the new unit, you retarded the advance part and your base timing went lower.
plug the vacuum advance into the manifold vacuum and see if your timing come's up, this is a great way to see if it work's too, then unplug it and see where it is at. if it is back where it was when you started, set the base timing and go and have fun! if it is diferant i bet you might need to do some work to fix your distributor.
[This message has been edited by ilbl8 (edited 04-26-2001).]