SS Springs on 75 Duster

I had a cam go down 4 years back. Started when putting car in trailer to go to the track next morning. It just didn't feel right. At track the car fell off a couple 10ths. And was popping a little on the high RPM. Like it was a carb issue. It quickly got worse. Then began acting like a timing issue. Until I pulled value cover off and can see a couple springs not pushing as hard as its mates. Ended the day. And that particular build in that motor. The lifters were flat solids so didn't show alot of damage. But cam lobes certainly did. This happened at about the time oil removed zinc from their formula. After a little research it turns out this had adverse effects to flat solid lifter. (Where hydrolic and rollers were better able to handle.) I now add comp additive to any motor that has higher cam demands.

Just sharing a simular experience.