I have a 1972 Mustang with a 351C, 4-V. I'm replacing the stock Motorcraft 4300D that's on it with an Edelbrock 750 cfm, because the Motorcraft float is screwed up and the secondaries are frozen shut. As the car is now, it won't start with the stock carb. I need to determine if the distributor vacuum port on the stock 4300D carb is timed (no vacuum at idle) or full (vacuum at idle). Since I can't start it with this carb on it, I can't do a simple vacuum test. Anyone know if this car has either timed or full distributor vacuum? Thanks.
- posted
19 years ago