Help with Timing, Vacuum and Backfire - 289c.i.

[Phillyfanfrombirth]

Originally Posted by Gearhead999

Sounds like a tight valve or a vacume leak. But, have we checked the firing order?? The cam isn't set up for 351W firing order is it??

Just trying to cover all the bases here.

Also, how about the booster for the power brakes, if it is equiped??

Good points... One of my brother's friends was smacking his head into a wall for a week before I had the chance to drop in and tell him that he was using the old 302 firiing order instead of the 5.0 order...

The car would run, it would just pop out the carb and didn't hold great vacuum...

He didn't believe me... so I proved it to him with the valve covers off and the distributor cap off. He understood what and why, then... and the car was a quick fix.