[Jerry Clayton]

The difference between 7 and 10 degree keepers is quite obvious--10 won't go into 7 retainers and 7 are very loose in 10 retainers and will probably go thru.

What is more a problem is using keepers for the wrong size valve stems--3/8 on 11/32, etc

there are also keeper/retainer packages set up for different install heights( +/- .050 install heights) and also keepers for lash caps

Hope it helps, but I would take one apart to check it out.

Jerry