Need 8 factory non rotator valve spring retainers

66fs said

I have a set but you also need to replace the valves. The keeper grooves are cut lower to keep the top of the rotators the same height.

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So I went out to the shop to see the difference in the valves. I do see what you mean and it got me wondering what the machine shop did to accommodate the comp cams springs and retainers I had them install on the last set of 360 heads I had done? Certainly they didn'the swap out the exhaust valves and not tell me. Or maybe they did?