I suggest going back to the source. Thats what Jerry and those Cali Bluegrasers did, in order to play that style with the necc feel and sensitivity.
Spend some quality time with Monroe, the Stanley Bros, Flatt & Scruggs, Reno & Smiley, and Jimmy Martin.
Especially Jimmy Martin for the Rhythm guitar.
Then graduate to some of these
Old and In the Way, of course
Here are some more gooduns
I assume you are playing guitar. If so, the right rhythm is crucial.
The mistake most rockers make is to much busy strummin goin on.
SIMPLIFY and PLAY THE BASS NOTES right on top of the beat.