Replacing Cab Mounts, any suggestions?

[71elect]

Hey guys,
I'm planning on changing out my sagging/cracked cab mounts on the 72 4x4. Anyone got any tricks for getting this done? I thought about using the floor jack to lift up the cab to replace the mounts. However it looks like to get the rear mounts out so that I can reuse the inner sleeve, I'll either have to jack the cab way up off the mount to remove it or drill out the rivets that hold on the mounting bracket to the frame and then replace the rivets with either grade 5 or grade 8 bolts. Any suggestions you guys got that have done this before would be greatly appreciated.

Thanks,
Josh