I've been using Fluidampr dampers for 25 years with zero issues
I always slightly hone the bore on them there is no reason they need to be THAT tight.
Gus

7923215-rearviewsavoy.jpg (195 downloads)
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60