85 lbs/ft...I ranked mine a touch over, to 100 but, they are silent as a tomb, even with poly bushes installed in them. the centre sleeve was made of a sturdier steel in the replacement bushes as well.
So... your 960 lb/in is right about ok, at 80 lbs/ft.
2014 Premium GT, SGM, Brembo, Auto, Tech, Comfort, etc. GT500s, Steeda UCA, VMP auto N/A tune. 100 shot nitrous on BBR tune. Best e/t 11.42 at 120.64
2012 Premium GT, Candy Red, Brembo package, 3.73, MT82, Comfort, Tech, et al. Procal tune, Roush UCA, UMI poly LCA, GT500s, Steeda red bracket, Hoosier 28x10x16 bias drags. Best e/t 11.91 at 115.23 RIP