1970 base Cougar 351 Cleveland.
Car had been dormant for a long time. When started carb was leaking everywhere. Put on new Edelbrock 600 and seemed to run fine.
After running it for about a total of an hour it was having trouble idling. Would rev up good but would hardly stay running aat idle. After checking seemed to have an intake vacuum leak.
Replace intake with Edelbrock performer and put the new Edelbrock 600 on top
Started it and it purred like a kitten. Problem solve. Right? NO!!!
Took it for test drive and it drove and idled great for about 30 miles. Then it decided to not idle again. Stalling whenever you came of the gas pedal. As long as you kept it revving it would run
Left it over night and started in morning. It would fire but then die.
Spayed for possible vacuum leak but found none.
It would still rev up fine
Checked timing was set at about 12 degrees
Car still has old electronic distributor.
Could it be the electronic distributor??
I think I have done everything to eliminate fuel/air problem
Any ideas would be appreciated.