Negative Height Valve Spring Retainers

Earlie A said
I found these:

VTO, 4140 Chrome Moly Steel Retainers 10 Degree 1.437"-1.450" - Competition Products

and these:

https://www.compcams.com/super-lockstm-10-176-angle-3-8-stem-size-16-qty.html

This would give me 0.100" without shims.

So the question is this - is there any problem mixing locks and retainers from two different manufacturers?

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.