When I installed the MORE mounts on my '96 it increased every single vib what feels like about 5-fold... and they haven't gotten much smoother/quieter in about 4K miles. HOWEVER... there is no more flex when standing on the throttle pedal and my mechanical fan no longer rubs on my 'new' radiator. These do give a great about of peace of mind.
I'm not sure you can actually put these in w/your motor being twisted. I'd bet more than likely your motor was a bit twisted (like mine was) w/the rubber mounts in there. I think it's just the nature of the beast to so speak.
Any little vib or rub or sound will get magnified w/these... but they will or should not ever fail like the OE Rubber mounts will.
I'm seriously thinking about pulling out my seats and carpet and installing some sound deadening material throughout just to help w/the vibrations and noise.... but hey, it's only a Jeep right...