I just got my engine running on Friday. As soon as I get a new input shaft for my transmission so I can drive it, I will let you know. I should be getting the input shaft today.
Ive had them for a year(eng and trans), it's not too bad.... I do notice the engine vibrating now, where I didnt before, but it's mild, only thru 2000 - 2400 range on my car. I feel it a little more at idle also. Transmits a little more noise thru the drivetrain too, along with my shifter, and rear susp control arms..... It all adds up in the end... there's always trade offs when it comes to performance.