topbanna70
Active Member
- Joined
- Aug 16, 2015
- Messages
- 35
- Reaction score
- 2
So I have rebuilt my six pack and have them installed and have the car running but as its running once it gets to operating temps it gets a backfire in the exhaust and the guy who rebuilt them said that sounds like a valve issue im trying to find someone to adjust the rockers but im wondering if anyone on here knows what a 340 should be set to any help would be greatly appreciated.