lowering ls motor mounts?

[mrobvious34]

I know this horse has been beat over and over, but I have found many are having the same problem I am, but I have not seen any threads with a solution. Does anyone make motor mounts that will set an LS lower in between the frame rails? I have a 6.0l/4L80 on GM BBC stands in a 67 SWB. At ride hight my engine sits tilted back 6 degrees, my drive shaft down at 1 degree, and my diff is 2 degrees. I am getting a bad vibration about 60 and need to correct my u joint angles. I have my trans up as high as i can get it (high hump), and would like to drop the motor mounts down to help with the angle. I am running a F-body oil pan and I have plenty of room for it to come down (about 2 inches). Anyone know of any motor mount stands that would sit lower? BTW, i cant remember where i got the trans crossmember but it is one of those M shaped tubular ones to clear the exhaust. I could shim the diff but i would rather not, I dont want a lot of u joint angle