A few questions before i commit

[72c10suburban]

Im planning on a LSx swap in my suburban in the next couple months. Im planning on a 5.3/4L60 combo with a cam swap. I know the fuel system will vary based on the year of the engine that i choose, but plan on ordering a new gas tank kit and using the weld in ring kit from vetteworks and running a factory pump.

My main concern is motor mounts. I won't be running A/C from the get go and when i do, i'm fine with one of the holley high mount kits for the compressor. i really dont want to have the drive shaft modified. Currently, the trans is a th-350 and i believe the yoke will work with the 4l60. I am leaning towards the DD slider mounts and swapping to the 73-87 stands.

My questions are will these mounts allow enough adjustment so the drive shaft wont have to be modified? Are there any plate type mounts that would work just as well?