Prior to approximately 1987 very little finite element analysis was used in the mechanical goods rubber industry. Today that is much different.
There are probably three programs that US manufacturers use to characterize rubber bushings:
I could not begin to answer all the potential questions concerning these programs so right away I suggest calling the experts. If you don’t have a representative from one of the companies above then call Axel Products at (734) 994-8309 to get a good handle on the finite element inputs and the programs themselves.