360 Magnum Valve Springs

With the Mopar Performance springs PN P2549464; would the stock retainers be sufficient? Or I should use??

Thanks

I assume you mean P5249464. I believe these are the R/T springs I used, and the stock retainers don't fit (these are not beehive springs...the stock ones are). you will need the P4452032 retainers or the retainers from a 2.2 or 2.5 OHC 4-cyl