Comp XE268H cam and lifters

Okay. I heard/read I could use the stock retainers and locks. Or do I have to get new ones?
This is going in a 318 with about 100,000 on the clock in my 84 dodge ramcharger I am redoing.
I had to buy the retainers because the springs didn't really match up good with my original retainers. Seems like they were kinda swimming in there or weren't sitting flat or something. Don't really remember, just remember it wasn't right.