More vibration with new motor mounts

[otto huber]

I just replaced the two motor mounts and the center anti-vibration t-mount on my '79 240D 4spd. The driver's side mount was shot, as well as the t-mount. Passenger side looked good, and I didn't bother with the transmission mount since it looks pretty good.
I adjusted the valves 8,000 miles ago. The vibration was never that bad in the first place, but I saw that huge crack in the driver's mount and figured I should change it. Will these mounts soften up after a few thousand miles? Any adjustments I can make? I'm thinking of putting the old passenger side mount where the new driver's side mount is now. Any thoughts would be appreciated. Thanks