I'm in the middle of my rebuild and need some info. I bought oversized valves from SI valves and need retainers and locks. SI says they don't carry them. The intake valves are a 2 groove lock and the exhaust are 4 grooves. Can anyone tell me where to get retainers and locks for these valves? Thanks, Doc.

Those valves should use stock style valve locks. Comp Cams has Chrysler multi-groove locks. Ignore the picture. https://www.summitracing.com/parts/cca-606-16/overview/

Retainers are based on the spring dimensions, but these are correct for a 340 type spring (large OD single spring with flat damper): https://www.summitracing.com/parts/cca-744-12

If you have smaller springs or certain dual springs you'll need different retainers.

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Joshua

Yes the SI valves I have I reused the locks from the stock valves.

Thanks for the info guys.