Aftermarket retainers is what I would get.

I used KMS. I took it to 9,400 rpm every day.

I dont know if was the Springs or the Retainers, but my Valves floated one time in cylinder #1. Thats what caused my engine to fail.

I didnt drop valves.. The valves floated, then shattered. The valves stems and all were still in the keepers tho.. The other half looked like Hershey's kisses. HAHA...


Maybe it was the Springs.. Thats my thought