Negative Height Valve Spring Retainers

There is always the issue of not getting the exact amount of change you want.

I’ve seen the .100 up stuff be as low as only .070 and I had some back in the 1990’s that were .125 up.

Other than that, it’s not usually an issue.
I'm going to have to shim some anyway. Both Chrysler's and my machining skills lead to some height differences.