I think your 3 1/2 ton floor jack would lift one wheel at a time. 9500 is probably the total but you are only lifting less than 1/4th of that on the rearend, a little more on the front. I would have tackled it with my 2 1/2 ton floor jack without giving it a second thought.

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.