Frame Cab Mounts

[Palf70Step]

This maybe a strange question but here goes anyways. I'm wondering if it is possible to put new frame/cab mounts on with out removing the cab?

They look 32 years old, and since I replaceing the front end and bed mounts I thought it would be good to do these too. My thoughts are to loosen all four bolts, then use my two floor jacks to lift the cab enough to slip out the old and slide in the new. It seems to me it would work on paper, but not sure if I am undertaking a mess.

Since I moved the shift to the floor, I don't have to worry about linkages. I figure I am going to have to disconnect the steering column so it'll lift, and I'm guessing the clutch linkage.

Is there anything else that might not let it rise up an inch or so so I can change out the mounts?

When I do this I plan to have everything out of the interrior, seat/tank etc. Doors will still be in place though.

Am I insane (OK, besides the normal insanity) for trying to do it this way?

Thanks for the help folks.