It looks like to me that you have a set of 10 degree keepers for lash caps and a set of 7 degree keepers with no lash cap provisions shruggy
How do the new keepers fit in the old valve retainers mount on the valve stems?
If the old retainer wobbles around on the new keepers and is tight on the older ones that is the problem scope

Last edited by Cab_Burge; 10/09/18 07:30 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)