904 accumulator spring differences, years?

oldkimmer said
U can also order 1 for a 440-6 or a Hemi trans. They go inside the acc. Kim

I have a couple of those, got them from big block motor home transmissions. Unless the 6 bbl/Hemi ones are different. I've often wondered about installing both springs, if it would act like a "soft" blocker rod. Guess I've finally asked about the idea.